Klocky.kt

import timber.log.Timber

object Klocky {
    private val tagToLastTimeMap = mutableMapOf<String, Long>()
    
    @JvmOverloads
    fun stamp(tag: String, message: String = "", restart: Boolean = false) {
        val currTime = System.currentTimeMillis()
        
        if (restart) tagToLastTimeMap.remove(tag)
        
        val log = StringBuilder("tag: $tag")
            .apply { tagToLastTimeMap[tag]?.let { append(", diff: ${(currTime - it)} millis") } }
            .apply { if (message.isNotEmpty()) append(", message: $message") }
            .apply { append(", time: $currTime UTC millis") }
        
        Timber.d(log.toString())
        
        tagToLastTimeMap[tag] = currTime
    }
}