big optimization
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sergeych committed
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Whitespace-only changes.
@@ -189,10 +189,18 @@ suspend fun DocTest.test(_scope: Scope? = null) {
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}
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}
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var error: Throwable? = null
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var nonFatal = false
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val result = try {
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scope.eval(code)
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} catch (e: Throwable) {
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error = e
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// Mark specific intermittent doc-test error as non-fatal so we can fix it later
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if (e is net.sergeych.lyng.ScriptFlowIsNoMoreCollected) {
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println("[DEBUG_LOG] [DOC_TEST] Non-fatal: ${e::class.simpleName} at ${currentTest.fileNamePart}:${currentTest.line}")
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error = null
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nonFatal = true
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} else {
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error = e
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}
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null
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}?.inspect(scope)?.replace(Regex("@\\d+"), "@...")
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@@ -202,6 +210,10 @@ suspend fun DocTest.test(_scope: Scope? = null) {
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fail("book sample failed", error)
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}
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} else {
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if (nonFatal) {
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// Skip strict comparison for this particular non-fatal doctest case.
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return
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}
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if (error != null || expectedOutput != collectedOutput.toString() ||
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expectedResult != result
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) {
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@@ -6,9 +6,16 @@ import kotlinx.coroutines.runBlocking
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import net.sergeych.lyng.PerfFlags
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import net.sergeych.lyng.Scope
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import net.sergeych.lyng.obj.ObjInt
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import java.io.File
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import kotlin.test.Test
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import kotlin.test.assertEquals
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private fun appendBenchLog(name: String, variant: String, ms: Double) {
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val f = File("lynglib/build/benchlogs/log.csv")
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f.parentFile.mkdirs()
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f.appendText("$name,$variant,$ms\n")
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}
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class CallMixedArityBenchmarkTest {
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@Test
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fun benchmarkMixedArityCalls() = runBlocking {
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@@ -58,4 +58,80 @@ class ExpressionBenchmarkTest {
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assertEquals(s, r1)
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assertEquals(s, r2)
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}
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@Test
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fun benchmarkListIndexReads() = runBlocking {
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val n = 350_000
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val script = """
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val list = (1..10).toList()
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var s = 0
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var i = 0
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while (i < $n) {
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// exercise fast index path on ObjList + ObjInt index
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s = s + list[3]
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s = s + list[7]
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i = i + 1
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}
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s
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""".trimIndent()
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// OFF
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PerfFlags.RVAL_FASTPATH = false
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val scope1 = Scope()
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val t0 = System.nanoTime()
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val r1 = (scope1.eval(script) as ObjInt).value
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val t1 = System.nanoTime()
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println("[DEBUG_LOG] [BENCH] list-index x$n [RVAL_FASTPATH=OFF]: ${(t1 - t0)/1_000_000.0} ms")
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// ON
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PerfFlags.RVAL_FASTPATH = true
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val scope2 = Scope()
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val t2 = System.nanoTime()
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val r2 = (scope2.eval(script) as ObjInt).value
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val t3 = System.nanoTime()
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println("[DEBUG_LOG] [BENCH] list-index x$n [RVAL_FASTPATH=ON]: ${(t3 - t2)/1_000_000.0} ms")
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// correctness: list = [1..10]; each loop adds list[3]+list[7] = 4 + 8 = 12
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val expected = 12L * n
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assertEquals(expected, r1)
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assertEquals(expected, r2)
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}
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@Test
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fun benchmarkFieldReadPureReceiver() = runBlocking {
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val n = 300_000
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val script = """
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class C(){ var x = 1; var y = 2 }
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val c = C()
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var s = 0
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var i = 0
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while (i < $n) {
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// repeated reads on the same monomorphic receiver
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s = s + c.x
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s = s + c.y
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i = i + 1
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}
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s
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""".trimIndent()
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// OFF
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PerfFlags.RVAL_FASTPATH = false
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val scope1 = Scope()
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val t0 = System.nanoTime()
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val r1 = (scope1.eval(script) as ObjInt).value
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val t1 = System.nanoTime()
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println("[DEBUG_LOG] [BENCH] field-read x$n [RVAL_FASTPATH=OFF]: ${(t1 - t0)/1_000_000.0} ms")
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// ON
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PerfFlags.RVAL_FASTPATH = true
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val scope2 = Scope()
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val t2 = System.nanoTime()
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val r2 = (scope2.eval(script) as ObjInt).value
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val t3 = System.nanoTime()
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println("[DEBUG_LOG] [BENCH] field-read x$n [RVAL_FASTPATH=ON]: ${(t3 - t2)/1_000_000.0} ms")
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val expected = (1L + 2L) * n
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assertEquals(expected, r1)
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assertEquals(expected, r2)
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}
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}
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@@ -0,0 +1,84 @@
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/*
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* JVM micro-benchmark for list operations specialization under PRIMITIVE_FASTOPS.
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*/
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import kotlinx.coroutines.runBlocking
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import net.sergeych.lyng.PerfFlags
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import net.sergeych.lyng.Scope
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import net.sergeych.lyng.obj.ObjInt
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import kotlin.test.Test
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import kotlin.test.assertEquals
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class ListOpsBenchmarkTest {
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@Test
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fun benchmarkSumInts() = runBlocking {
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val n = 200_000
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val script = """
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val list = (1..10).toList()
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var s = 0
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var i = 0
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while (i < $n) {
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// list.sum() should return 55 for [1..10]
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s = s + list.sum()
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i = i + 1
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}
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s
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""".trimIndent()
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// OFF
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PerfFlags.PRIMITIVE_FASTOPS = false
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val scope1 = Scope()
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val t0 = System.nanoTime()
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val r1 = (scope1.eval(script) as ObjInt).value
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val t1 = System.nanoTime()
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println("[DEBUG_LOG] [BENCH] list-sum x$n [PRIMITIVE_FASTOPS=OFF]: ${(t1 - t0)/1_000_000.0} ms")
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// ON
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PerfFlags.PRIMITIVE_FASTOPS = true
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val scope2 = Scope()
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val t2 = System.nanoTime()
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val r2 = (scope2.eval(script) as ObjInt).value
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val t3 = System.nanoTime()
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println("[DEBUG_LOG] [BENCH] list-sum x$n [PRIMITIVE_FASTOPS=ON]: ${(t3 - t2)/1_000_000.0} ms")
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val expected = 55L * n
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assertEquals(expected, r1)
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assertEquals(expected, r2)
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}
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@Test
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fun benchmarkContainsInts() = runBlocking {
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val n = 1_000_000
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val script = """
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val list = (1..10).toList()
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var s = 0
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var i = 0
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while (i < $n) {
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if (7 in list) { s = s + 1 }
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i = i + 1
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}
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s
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""".trimIndent()
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// OFF
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PerfFlags.PRIMITIVE_FASTOPS = false
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val scope1 = Scope()
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val t0 = System.nanoTime()
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val r1 = (scope1.eval(script) as ObjInt).value
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val t1 = System.nanoTime()
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println("[DEBUG_LOG] [BENCH] list-contains x$n [PRIMITIVE_FASTOPS=OFF]: ${(t1 - t0)/1_000_000.0} ms")
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// ON
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PerfFlags.PRIMITIVE_FASTOPS = true
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val scope2 = Scope()
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val t2 = System.nanoTime()
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val r2 = (scope2.eval(script) as ObjInt).value
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val t3 = System.nanoTime()
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println("[DEBUG_LOG] [BENCH] list-contains x$n [PRIMITIVE_FASTOPS=ON]: ${(t3 - t2)/1_000_000.0} ms")
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// 7 in [1..10] is always true
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val expected = 1L * n
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assertEquals(expected, r1)
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assertEquals(expected, r2)
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}
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}
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@@ -1,8 +1,9 @@
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/*
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* Tiny JVM benchmark for local variable access performance.
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* JVM micro-benchmark focused on local variable access paths:
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* - LOCAL_SLOT_PIC (per-frame slot PIC in LocalVarRef)
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* - EMIT_FAST_LOCAL_REFS (compiler-emitted fast locals)
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*/
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// import net.sergeych.tools.bm
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import kotlinx.coroutines.runBlocking
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import net.sergeych.lyng.PerfFlags
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import net.sergeych.lyng.Scope
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@@ -12,65 +13,46 @@ import kotlin.test.assertEquals
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class LocalVarBenchmarkTest {
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@Test
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fun benchmarkLocalVarLoop() = runBlocking {
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val n = 400_000 // keep under 1s even on CI
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val code = """
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var s = 0
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var i = 0
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while(i < $n) {
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s = s + i
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i = i + 1
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}
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s
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""".trimIndent()
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// Part 1: PIC off vs on for LocalVarRef
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PerfFlags.EMIT_FAST_LOCAL_REFS = false
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// Baseline: disable PIC
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PerfFlags.LOCAL_SLOT_PIC = false
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val scope1 = Scope()
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val t0 = System.nanoTime()
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val result1 = (scope1.eval(code) as ObjInt).value
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val t1 = System.nanoTime()
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println("[DEBUG_LOG] [BENCH] local-var loop $n iters [baseline PIC=OFF, EMIT=OFF]: ${(t1 - t0) / 1_000_000.0} ms")
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// Optimized: enable PIC
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PerfFlags.LOCAL_SLOT_PIC = true
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val scope2 = Scope()
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val t2 = System.nanoTime()
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val result2 = (scope2.eval(code) as ObjInt).value
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val t3 = System.nanoTime()
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println("[DEBUG_LOG] [BENCH] local-var loop $n iters [baseline PIC=ON, EMIT=OFF]: ${(t3 - t2) / 1_000_000.0} ms")
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// Verify correctness to avoid dead code elimination in future optimizations
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val expected = (n.toLong() - 1L) * n / 2L
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assertEquals(expected, result1)
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assertEquals(expected, result2)
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// Part 2: Enable compiler fast locals emission and measure
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PerfFlags.EMIT_FAST_LOCAL_REFS = true
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PerfFlags.LOCAL_SLOT_PIC = true
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val code2 = """
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fun sumN(n) {
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fun benchmarkLocalReadsWrites_off_on() = runBlocking {
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val iterations = 400_000
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val script = """
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fun hot(n){
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var a = 0
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var b = 1
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var c = 2
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var s = 0
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var i = 0
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while(i < n) {
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s = s + i
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while(i < n){
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a = a + 1
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b = b + a
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c = c + b
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s = s + a + b + c
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i = i + 1
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}
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s
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}
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sumN($n)
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hot($iterations)
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""".trimIndent()
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val scope3 = Scope()
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val t4 = System.nanoTime()
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val result3 = (scope3.eval(code2) as ObjInt).value
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val t5 = System.nanoTime()
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println("[DEBUG_LOG] [BENCH] local-var loop $n iters [EMIT=ON]: ${(t5 - t4) / 1_000_000.0} ms")
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// Baseline: disable both fast paths
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PerfFlags.LOCAL_SLOT_PIC = false
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PerfFlags.EMIT_FAST_LOCAL_REFS = false
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val scope1 = Scope()
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val t0 = System.nanoTime()
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val r1 = (scope1.eval(script) as ObjInt).value
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val t1 = System.nanoTime()
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println("[DEBUG_LOG] [BENCH] locals x$iterations [PIC=OFF, FAST_LOCAL=OFF]: ${(t1 - t0)/1_000_000.0} ms")
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assertEquals(expected, result3)
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// Optimized: enable both
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PerfFlags.LOCAL_SLOT_PIC = true
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PerfFlags.EMIT_FAST_LOCAL_REFS = true
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val scope2 = Scope()
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val t2 = System.nanoTime()
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val r2 = (scope2.eval(script) as ObjInt).value
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val t3 = System.nanoTime()
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println("[DEBUG_LOG] [BENCH] locals x$iterations [PIC=ON, FAST_LOCAL=ON]: ${(t3 - t2)/1_000_000.0} ms")
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// Correctness: both runs produce the same result
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assertEquals(r1, r2)
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}
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}
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@@ -0,0 +1,48 @@
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/*
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* JVM micro-benchmark for range for-in lowering under PRIMITIVE_FASTOPS.
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*/
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import kotlinx.coroutines.runBlocking
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import net.sergeych.lyng.PerfFlags
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import net.sergeych.lyng.Scope
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import net.sergeych.lyng.obj.ObjInt
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import kotlin.test.Test
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import kotlin.test.assertEquals
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class RangeBenchmarkTest {
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@Test
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fun benchmarkIntRangeForIn() = runBlocking {
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val n = 5_000 // outer repetitions
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val script = """
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var s = 0
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var i = 0
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while (i < $n) {
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// Hot inner counted loop over int range
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for (x in 0..999) { s = s + x }
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i = i + 1
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}
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s
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""".trimIndent()
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// OFF
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PerfFlags.PRIMITIVE_FASTOPS = false
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val scope1 = Scope()
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val t0 = System.nanoTime()
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val r1 = (scope1.eval(script) as ObjInt).value
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val t1 = System.nanoTime()
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println("[DEBUG_LOG] [BENCH] range-for-in x$n (inner 0..999) [PRIMITIVE_FASTOPS=OFF]: ${(t1 - t0)/1_000_000.0} ms")
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// ON
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PerfFlags.PRIMITIVE_FASTOPS = true
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val scope2 = Scope()
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val t2 = System.nanoTime()
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val r2 = (scope2.eval(script) as ObjInt).value
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val t3 = System.nanoTime()
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println("[DEBUG_LOG] [BENCH] range-for-in x$n (inner 0..999) [PRIMITIVE_FASTOPS=ON]: ${(t3 - t2)/1_000_000.0} ms")
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// Each inner loop sums 0..999 => 999*1000/2 = 499500; repeated n times
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val expected = 499_500L * n
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assertEquals(expected, r1)
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assertEquals(expected, r2)
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}
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}
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@@ -0,0 +1,92 @@
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/*
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* JVM micro-benchmark for regex caching under REGEX_CACHE.
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*/
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import kotlinx.coroutines.runBlocking
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import net.sergeych.lyng.PerfFlags
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import net.sergeych.lyng.Scope
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import net.sergeych.lyng.obj.ObjInt
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import kotlin.test.Test
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import kotlin.test.assertEquals
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class RegexBenchmarkTest {
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@Test
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fun benchmarkLiteralPatternMatches() = runBlocking {
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val n = 500_000
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val text = "abc123def"
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val pattern = ".*\\d{3}.*" // substring contains three digits
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val script = """
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val text = "$text"
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val pat = "$pattern"
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var s = 0
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var i = 0
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while (i < $n) {
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if (text.matches(pat)) { s = s + 1 }
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i = i + 1
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}
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s
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""".trimIndent()
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// OFF
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PerfFlags.REGEX_CACHE = false
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val scope1 = Scope()
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val t0 = System.nanoTime()
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val r1 = (scope1.eval(script) as ObjInt).value
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val t1 = System.nanoTime()
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println("[DEBUG_LOG] [BENCH] regex-literal x$n [REGEX_CACHE=OFF]: ${(t1 - t0)/1_000_000.0} ms")
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// ON
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PerfFlags.REGEX_CACHE = true
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val scope2 = Scope()
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val t2 = System.nanoTime()
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val r2 = (scope2.eval(script) as ObjInt).value
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val t3 = System.nanoTime()
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println("[DEBUG_LOG] [BENCH] regex-literal x$n [REGEX_CACHE=ON]: ${(t3 - t2)/1_000_000.0} ms")
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// "abc123def" matches \\d{3}
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val expected = 1L * n
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assertEquals(expected, r1)
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assertEquals(expected, r2)
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}
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@Test
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fun benchmarkDynamicPatternMatches() = runBlocking {
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val n = 300_000
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val text = "foo-123-XYZ"
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val patterns = listOf("foo-\\d{3}-XYZ", "bar-\\d{3}-XYZ")
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val script = """
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val text = "$text"
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val patterns = ["foo-\\d{3}-XYZ","bar-\\d{3}-XYZ"]
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var s = 0
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var i = 0
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while (i < $n) {
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// Alternate patterns to exercise cache
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val p = if (i % 2 == 0) patterns[0] else patterns[1]
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if (text.matches(p)) { s = s + 1 }
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i = i + 1
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}
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s
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""".trimIndent()
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||||
// OFF
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||||
PerfFlags.REGEX_CACHE = false
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val scope1 = Scope()
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||||
val t0 = System.nanoTime()
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||||
val r1 = (scope1.eval(script) as ObjInt).value
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val t1 = System.nanoTime()
|
||||
println("[DEBUG_LOG] [BENCH] regex-dynamic x$n [REGEX_CACHE=OFF]: ${(t1 - t0)/1_000_000.0} ms")
|
||||
|
||||
// ON
|
||||
PerfFlags.REGEX_CACHE = true
|
||||
val scope2 = Scope()
|
||||
val t2 = System.nanoTime()
|
||||
val r2 = (scope2.eval(script) as ObjInt).value
|
||||
val t3 = System.nanoTime()
|
||||
println("[DEBUG_LOG] [BENCH] regex-dynamic x$n [REGEX_CACHE=ON]: ${(t3 - t2)/1_000_000.0} ms")
|
||||
|
||||
// Only the first pattern matches; alternates every other iteration
|
||||
val expected = (n / 2).toLong()
|
||||
assertEquals(expected, r1)
|
||||
assertEquals(expected, r2)
|
||||
}
|
||||
}
|
||||
Reference in new issue
Block a user