Kotlin - A wrapper for measureTimeMillis that also prints to ADB log.

logTime.kt

// Usage:                    logTime { anyFunction() }
// Output in Android logcat: LogTime: 2ms

// logTime returns the value and type returned by the function, so you can:
//
// val distance: Int = logTime { distanceTo.localized }
//
// It will print to console log the time `distanceTo.localized` took to process,
// and will return its value to be captured by `distance` var.

fun <T> logTime(tag: String = "LogTime", f: () -> T): T {
    val result: T by lazy { f() }
    Log.d(tag, "${measureTimeMillis { result }}")
    return result
}