diff --git a/lynglib/src/commonMain/kotlin/net/sergeych/lyng/obj/ObjString.kt b/lynglib/src/commonMain/kotlin/net/sergeych/lyng/obj/ObjString.kt
index 9a90af3..f40b77c 100644
--- a/lynglib/src/commonMain/kotlin/net/sergeych/lyng/obj/ObjString.kt
+++ b/lynglib/src/commonMain/kotlin/net/sergeych/lyng/obj/ObjString.kt
@@ -41,12 +41,12 @@ data class ObjString(val value: String) : Obj() {
     }
 
     override suspend fun getAt(scope: Scope, index: Obj): Obj {
-        if( index is ObjInt) return ObjChar(value[index.toInt()])
-        if( index is ObjRange) {
-            val start = if(index.start == null || index.start.isNull) 0 else  index.start.toInt()
-            val end = if( index.end  == null || index.end.isNull ) value.length else  {
+        if (index is ObjInt) return ObjChar(value[index.toInt()])
+        if (index is ObjRange) {
+            val start = if (index.start == null || index.start.isNull) 0 else index.start.toInt()
+            val end = if (index.end == null || index.end.isNull) value.length else {
                 val e = index.end.toInt()
-                if( index.isEndInclusive) e + 1 else e
+                if (index.isEndInclusive) e + 1 else e
             }
             return ObjString(value.substring(start, end))
         }
@@ -60,7 +60,7 @@ data class ObjString(val value: String) : Obj() {
     override suspend fun callOn(scope: Scope): Obj {
         return ObjString(this.value.sprintf(*scope.args
             .toKotlinList(scope)
-            .map { if( it == null) "null" else it }
+            .map { if (it == null) "null" else it }
             .toTypedArray()))
     }
 
@@ -81,17 +81,24 @@ data class ObjString(val value: String) : Obj() {
         return value == other.value
     }
 
+    override suspend fun lynonType(): LynonType = LynonType.String
+
     override suspend fun serialize(scope: Scope, encoder: LynonEncoder, lynonType: LynonType?) {
-        encoder.encodeBinaryData(value.encodeToByteArray())
+        if( lynonType == null )
+        encoder.encodeCached(this) { encoder.encodeBinaryData(value.encodeToByteArray()) }
+        else
+            encoder.encodeBinaryData(value.encodeToByteArray())
     }
 
+
     companion object {
         val type = object : ObjClass("String") {
             override suspend fun deserialize(scope: Scope, decoder: LynonDecoder, lynonType: LynonType?): Obj =
-                ObjString(
-                    decoder.unpackBinaryData().decodeToString()
-//                        ?: scope.raiseError("unexpected end of data")
-                )
+                if( lynonType == null )
+                    decoder.decodeCached {
+                        ObjString(decoder.unpackBinaryData().decodeToString())
+                    }
+                else ObjString(decoder.unpackBinaryData().decodeToString())
         }.apply {
             addFn("toInt") {
                 ObjInt(thisAs<ObjString>().value.toLong())
diff --git a/lynglib/src/commonMain/kotlin/net/sergeych/lynon/LynonDecoder.kt b/lynglib/src/commonMain/kotlin/net/sergeych/lynon/LynonDecoder.kt
index 4d6a12f..a56112c 100644
--- a/lynglib/src/commonMain/kotlin/net/sergeych/lynon/LynonDecoder.kt
+++ b/lynglib/src/commonMain/kotlin/net/sergeych/lynon/LynonDecoder.kt
@@ -41,7 +41,7 @@ open class LynonDecoder(val bin: BitInput, val settings: LynonSettings = LynonSe
 
     // todo: rewrite/remove?
     suspend fun unpackObject(scope: Scope, type: ObjClass): Obj {
-        return decodeCached { type.deserialize(scope, this, null) }
+        return type.deserialize(scope, this, null)
     }
 
     fun unpackBinaryData(): ByteArray = bin.decompress()
diff --git a/lynglib/src/commonMain/kotlin/net/sergeych/lynon/LynonEncoder.kt b/lynglib/src/commonMain/kotlin/net/sergeych/lynon/LynonEncoder.kt
index c5cc44b..c681d5c 100644
--- a/lynglib/src/commonMain/kotlin/net/sergeych/lynon/LynonEncoder.kt
+++ b/lynglib/src/commonMain/kotlin/net/sergeych/lynon/LynonEncoder.kt
@@ -21,28 +21,29 @@ enum class LynonType(val objClass: ObjClass) {
     Other(Obj.rootObjectType);
 }
 
-open class LynonEncoder(val bout: BitOutput,val settings: LynonSettings = LynonSettings.default) {
+open class LynonEncoder(val bout: BitOutput, val settings: LynonSettings = LynonSettings.default) {
 
     val cache = mutableMapOf<Any, Int>()
 
     suspend fun encodeCached(item: Any, packer: suspend LynonEncoder.() -> Unit) {
 
-        suspend fun serializeAndCache(key: Any=item) {
-            bout.putBit(0)
-            if( settings.shouldCache(item) )
-                cache[key] = cache.size
-            packer()
-        }
-
-        when(item) {
-            is Obj -> cache[item]?.let { cacheId ->
+        suspend fun serializeAndCache(key: Any = item) {
+            cache[key]?.let { cacheId ->
                 val size = sizeInBits(cache.size)
                 bout.putBit(1)
                 bout.putBits(cacheId.toULong(), size)
-            } ?: serializeAndCache()
+            } ?: run {
+                bout.putBit(0)
+                if (settings.shouldCache(item))
+                    cache[key] = cache.size
+                packer()
+            }
+        }
 
+        when (item) {
             is ByteArray -> serializeAndCache(ByteChunk(item.asUByteArray()))
-            is UByteArray ->  serializeAndCache(ByteChunk(item))
+            is UByteArray -> serializeAndCache(ByteChunk(item))
+            else -> serializeAndCache(item)
         }
     }
 
@@ -52,7 +53,7 @@ open class LynonEncoder(val bout: BitOutput,val settings: LynonSettings = LynonS
      *
      * Caching is used automatically.
      */
-    suspend fun encodeAny(scope: Scope,value: Obj) {
+    suspend fun encodeAny(scope: Scope, value: Obj) {
         encodeCached(value) {
             val type = value.lynonType()
             putType(type)
@@ -65,9 +66,7 @@ open class LynonEncoder(val bout: BitOutput,val settings: LynonSettings = LynonS
     }
 
     suspend fun encodeObj(scope: Scope, obj: Obj) {
-        encodeCached(obj) {
             obj.serialize(scope, this, null)
-        }
     }
 
     fun encodeBinaryData(data: ByteArray) {
diff --git a/lynglib/src/jvmTest/kotlin/LynonTests.kt b/lynglib/src/jvmTest/kotlin/LynonTests.kt
index 98be838..582f618 100644
--- a/lynglib/src/jvmTest/kotlin/LynonTests.kt
+++ b/lynglib/src/jvmTest/kotlin/LynonTests.kt
@@ -321,13 +321,14 @@ class LynonTests {
             testEncode(false)
             testEncode(1.22345)
             testEncode(-π)
-            
+
             import lyng.time
             testEncode(Instant.now().truncateToSecond())
             testEncode(Instant.now().truncateToMillisecond())
             testEncode(Instant.now().truncateToMicrosecond())
-            
+
             testEncode("Hello, world".encodeUtf8())
+            testEncode("Hello, world")
             
         """.trimIndent())
     }