diff --git a/src/commonMain/kotlin/CallbackKSLog.kt b/src/commonMain/kotlin/CallbackKSLog.kt
new file mode 100644
index 0000000..13c496f
--- /dev/null
+++ b/src/commonMain/kotlin/CallbackKSLog.kt
@@ -0,0 +1,7 @@
+package dev.inmo.kslog.common
+
+class CallbackKSLog(
+    private val performLogCallback: (level: LogLevel, tag: String?, message: String, throwable: Throwable?) -> Unit
+) : KSLog {
+    override fun performLog(level: LogLevel, tag: String?, message: String, throwable: Throwable?) = performLogCallback(level, tag, message, throwable)
+}
diff --git a/src/commonMain/kotlin/DefaultKSLog.kt b/src/commonMain/kotlin/DefaultKSLog.kt
new file mode 100644
index 0000000..5fbd9f5
--- /dev/null
+++ b/src/commonMain/kotlin/DefaultKSLog.kt
@@ -0,0 +1,26 @@
+package dev.inmo.kslog.common
+
+class DefaultKSLog(
+    private val defaultTag: String,
+    private val filter: MessageFilter = { _, _, _, _ -> true },
+    private val messageFormatter: MessageFormatter = defaultMessageFormatter,
+    private val logging: (level: LogLevel, tag: String, message: String, throwable: Throwable?) -> Unit
+) : KSLog {
+    override fun performLog(level: LogLevel, tag: String?, message: String, throwable: Throwable?) {
+        TODO("Not yet implemented")
+    }
+
+    override fun performLog(level: LogLevel, tag: String?, throwable: Throwable?, messageBuilder: () -> String) {
+        super.performLog(level, tag, throwable, messageBuilder)
+    }
+
+    override suspend fun performLog(
+        level: LogLevel,
+        tag: String?,
+        throwable: Throwable?,
+        messageBuilder: suspend () -> String
+    ) {
+        if (filter(level, tag, ))
+        super.performLog(level, tag, throwable, messageBuilder)
+    }
+}
diff --git a/src/commonMain/kotlin/Extensions.kt b/src/commonMain/kotlin/Extensions.kt
index abdf527..ac2fbd1 100644
--- a/src/commonMain/kotlin/Extensions.kt
+++ b/src/commonMain/kotlin/Extensions.kt
@@ -2,72 +2,72 @@
 
 package dev.inmo.kslog.common
 
-inline fun KSLog.log(level: LogLevel, tag: String? = null, e: Throwable? = null, messageBuilder: () -> String) = performLog(level, tag, messageBuilder(), e)
-inline fun KSLog.log(level: LogLevel, message: String, e: Throwable? = null) = log(level, null, e) { message }
-inline fun KSLog.log(level: LogLevel, tag: String, message: String, e: Throwable? = null) = log(level, tag, e) { message }
+inline fun KSLog.log(level: LogLevel, tag: String? = null, e: Throwable? = null, noinline messageBuilder: () -> String) = performLog(level, tag, e, messageBuilder)
+inline fun KSLog.log(level: LogLevel, message: String, e: Throwable? = null) = performLog(level, message, e)
+inline fun KSLog.log(level: LogLevel, tag: String, message: String, e: Throwable? = null) = performLog(level, tag, message, e)
 
 
-inline fun KSLog.verbose(tag: String? = null, e: Throwable? = null, messageBuilder: () -> String) = log(LogLevel.VERBOSE, tag, e, messageBuilder)
+inline fun KSLog.verbose(tag: String? = null, e: Throwable? = null, noinline messageBuilder: () -> String) = log(LogLevel.VERBOSE, tag, e, messageBuilder)
 inline fun KSLog.verbose(message: String, e: Throwable? = null) = log(LogLevel.VERBOSE, message, e)
 inline fun KSLog.verbose(tag: String, message: String, e: Throwable? = null) = log(LogLevel.VERBOSE, tag, message, e)
 
 
-inline fun KSLog.info(tag: String? = null, e: Throwable? = null, messageBuilder: () -> String) = log(LogLevel.INFO, tag, e, messageBuilder)
+inline fun KSLog.info(tag: String? = null, e: Throwable? = null, noinline messageBuilder: () -> String) = log(LogLevel.INFO, tag, e, messageBuilder)
 inline fun KSLog.info(message: String, e: Throwable? = null) = log(LogLevel.INFO, message, e)
 inline fun KSLog.info(tag: String, message: String, e: Throwable? = null) = log(LogLevel.INFO, tag, message, e)
 
 
-inline fun KSLog.warning(tag: String? = null, e: Throwable? = null, messageBuilder: () -> String) = log(LogLevel.WARNING, tag, e, messageBuilder)
+inline fun KSLog.warning(tag: String? = null, e: Throwable? = null, noinline messageBuilder: () -> String) = log(LogLevel.WARNING, tag, e, messageBuilder)
 inline fun KSLog.warning(message: String, e: Throwable? = null) = log(LogLevel.WARNING, message, e)
 inline fun KSLog.warning(tag: String, message: String, e: Throwable? = null) = log(LogLevel.WARNING, tag, message, e)
 
 
-inline fun KSLog.error(tag: String? = null, e: Throwable? = null, messageBuilder: () -> String) = log(LogLevel.ERROR, tag, e, messageBuilder)
+inline fun KSLog.error(tag: String? = null, e: Throwable? = null, noinline messageBuilder: () -> String) = log(LogLevel.ERROR, tag, e, messageBuilder)
 inline fun KSLog.error(message: String, e: Throwable? = null) = log(LogLevel.ERROR, message, e)
 inline fun KSLog.error(tag: String, message: String, e: Throwable? = null) = log(LogLevel.ERROR, tag, message, e)
 
 
-inline fun KSLog.assert(tag: String? = null, e: Throwable? = null, messageBuilder: () -> String) = log(LogLevel.ASSERT, tag, e, messageBuilder)
+inline fun KSLog.assert(tag: String? = null, e: Throwable? = null, noinline messageBuilder: () -> String) = log(LogLevel.ASSERT, tag, e, messageBuilder)
 inline fun KSLog.assert(message: String, e: Throwable? = null) = log(LogLevel.ASSERT, message, e)
 inline fun KSLog.assert(tag: String, message: String, e: Throwable? = null) = log(LogLevel.ASSERT, tag, message, e)
 
 
-inline fun KSLog.debug(tag: String? = null, e: Throwable? = null, messageBuilder: () -> String) = log(LogLevel.DEBUG, tag, e, messageBuilder)
+inline fun KSLog.debug(tag: String? = null, e: Throwable? = null, noinline messageBuilder: () -> String) = log(LogLevel.DEBUG, tag, e, messageBuilder)
 inline fun KSLog.debug(message: String, e: Throwable? = null) = log(LogLevel.DEBUG, message, e)
 inline fun KSLog.debug(tag: String, message: String, e: Throwable? = null) = log(LogLevel.DEBUG, tag, message, e)
 
 // ----- Short names
 
 
-inline fun KSLog.l(level: LogLevel, tag: String? = null, e: Throwable? = null, messageBuilder: () -> String) = log(level, tag, e, messageBuilder)
+inline fun KSLog.l(level: LogLevel, tag: String? = null, e: Throwable? = null, noinline messageBuilder: () -> String) = log(level, tag, e, messageBuilder)
 inline fun KSLog.l(level: LogLevel, message: String, e: Throwable? = null) = log(level, message, e)
 inline fun KSLog.l(level: LogLevel, tag: String, message: String, e: Throwable? = null) = log(level, tag, message, e)
 
-inline fun KSLog.v(tag: String? = null, e: Throwable? = null, messageBuilder: () -> String) = verbose(tag, e, messageBuilder)
+inline fun KSLog.v(tag: String? = null, e: Throwable? = null, noinline messageBuilder: () -> String) = verbose(tag, e, messageBuilder)
 inline fun KSLog.v(message: String, e: Throwable? = null) = verbose(message, e)
 inline fun KSLog.v(tag: String, message: String, e: Throwable? = null) = verbose(tag, message, e)
 
 
-inline fun KSLog.i(tag: String? = null, e: Throwable? = null, messageBuilder: () -> String) = info(tag, e, messageBuilder)
+inline fun KSLog.i(tag: String? = null, e: Throwable? = null, noinline messageBuilder: () -> String) = info(tag, e, messageBuilder)
 inline fun KSLog.i(message: String, e: Throwable? = null) = info(message, e)
 inline fun KSLog.i(tag: String, message: String, e: Throwable? = null) = info(tag, message, e)
 
 
-inline fun KSLog.w(tag: String? = null, e: Throwable? = null, messageBuilder: () -> String) = warning(tag, e, messageBuilder)
+inline fun KSLog.w(tag: String? = null, e: Throwable? = null, noinline messageBuilder: () -> String) = warning(tag, e, messageBuilder)
 inline fun KSLog.w(message: String, e: Throwable? = null) = warning(message, e)
 inline fun KSLog.w(tag: String, message: String, e: Throwable? = null) = warning(tag, message, e)
 
 
-inline fun KSLog.e(tag: String? = null, e: Throwable? = null, messageBuilder: () -> String) = error(tag, e, messageBuilder)
+inline fun KSLog.e(tag: String? = null, e: Throwable? = null, noinline messageBuilder: () -> String) = error(tag, e, messageBuilder)
 inline fun KSLog.e(message: String, e: Throwable? = null) = error(message, e)
 inline fun KSLog.e(tag: String, message: String, e: Throwable? = null) = error(tag, message, e)
 
 
-inline fun KSLog.wtf(tag: String? = null, e: Throwable? = null, messageBuilder: () -> String) = assert(tag, e, messageBuilder)
+inline fun KSLog.wtf(tag: String? = null, e: Throwable? = null, noinline messageBuilder: () -> String) = assert(tag, e, messageBuilder)
 inline fun KSLog.wtf(message: String, e: Throwable? = null) = assert(message, e)
 inline fun KSLog.wtf(tag: String, message: String, e: Throwable? = null) = assert(tag, message, e)
 
 
-inline fun KSLog.d(tag: String? = null, e: Throwable? = null, messageBuilder: () -> String) = debug(tag, e, messageBuilder)
+inline fun KSLog.d(tag: String? = null, e: Throwable? = null, noinline messageBuilder: () -> String) = debug(tag, e, messageBuilder)
 inline fun KSLog.d(message: String, e: Throwable? = null) = debug(message, e)
 inline fun KSLog.d(tag: String, message: String, e: Throwable? = null) = debug(tag, message, e)
diff --git a/src/commonMain/kotlin/KSLog.kt b/src/commonMain/kotlin/KSLog.kt
index 000ebcd..182283e 100644
--- a/src/commonMain/kotlin/KSLog.kt
+++ b/src/commonMain/kotlin/KSLog.kt
@@ -12,6 +12,19 @@ enum class LogLevel {
 
 interface KSLog {
     fun performLog(level: LogLevel, tag: String?, message: String, throwable: Throwable?)
+    fun performLog(level: LogLevel, message: String, throwable: Throwable?) = performLog(level, null, message, throwable)
+    fun performLog(
+        level: LogLevel,
+        tag: String?,
+        throwable: Throwable?,
+        messageBuilder: () -> String
+    ) = performLog(level, tag, messageBuilder(), throwable)
+    suspend fun performLog(
+        level: LogLevel,
+        tag: String?,
+        throwable: Throwable?,
+        messageBuilder: suspend () -> String
+    ) = performLog(level, tag, messageBuilder(), throwable)
     companion object : KSLog {
         private var defaultLogger: KSLog? = null
         var default: KSLog
@@ -30,12 +43,6 @@ interface KSLog {
 
 operator fun KSLog.invoke(performLogCallback: (level: LogLevel, tag: String?, message: String, throwable: Throwable?) -> Unit) = CallbackKSLog(performLogCallback)
 
-class CallbackKSLog(
-    private val performLogCallback: (level: LogLevel, tag: String?, message: String, throwable: Throwable?) -> Unit
-) : KSLog {
-    override fun performLog(level: LogLevel, tag: String?, message: String, throwable: Throwable?) = performLogCallback(level, tag, message, throwable)
-}
-
 expect fun KSLog(
     defaultTag: String,
     filter: MessageFilter = { _, _, _, _ -> true },