From 8e99f164a77a2aba4eb736e4b1f2819eb0e67947 Mon Sep 17 00:00:00 2001
From: jackkoenig
Date: Fri, 29 Apr 2016 09:42:23 -0700
Subject: Add time function to Utils

time uses LazyLogging, also delete import PrimOps._ (cyclic reference)
---
 src/main/scala/firrtl/Utils.scala | 15 +++++++++++++--
 1 file changed, 13 insertions(+), 2 deletions(-)

(limited to 'src')

diff --git a/src/main/scala/firrtl/Utils.scala b/src/main/scala/firrtl/Utils.scala
index 16a56893..30dff01c 100644
--- a/src/main/scala/firrtl/Utils.scala
+++ b/src/main/scala/firrtl/Utils.scala
@@ -38,7 +38,7 @@ package firrtl
 
 import scala.collection.mutable.StringBuilder
 import java.io.PrintWriter
-import PrimOps._
+import com.typesafe.scalalogging.LazyLogging
 import WrappedExpression._
 import firrtl.WrappedType._
 import firrtl.Mappers._
@@ -46,7 +46,18 @@ import scala.collection.mutable.ArrayBuffer
 import scala.collection.mutable.LinkedHashMap
 //import scala.reflect.runtime.universe._
 
-object Utils {
+object Utils extends LazyLogging {
+  private[firrtl] def time[R](name: String)(block: => R): R = {
+    logger.info(s"Starting $name")
+    val t0 = System.nanoTime()
+    val result = block
+    val t1 = System.nanoTime()
+    logger.info(s"Finished $name")
+    val timeMillis = (t1 - t0) / 1000000.0
+    logger.info(f"$name took $timeMillis%.1f ms\n")
+    result
+  }
+
    implicit class WithAs[T](x: T) {
      import scala.reflect._
      def as[O: ClassTag]: Option[O] = x match {
-- 
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