From 9c92e04d821fd5f5756c48c101f925ea3dbf3bbc Mon Sep 17 00:00:00 2001
From: "Maxim.Mossienko" <Maxim.Mossienko@jetbrains.com>
Date: Wed, 7 Oct 2015 14:56:36 +0200
Subject: [PATCH] call nanoTime() only if we have flag set to dump timing

---
 platform/util/src/com/intellij/util/CompressionUtil.java  | 8 ++++----
 .../intellij/util/io/PersistentHashMapValueStorage.java   | 4 ++--
 2 files changed, 6 insertions(+), 6 deletions(-)

diff --git a/platform/util/src/com/intellij/util/CompressionUtil.java b/platform/util/src/com/intellij/util/CompressionUtil.java
index fe2fa15d45c3..ee36d99ea042 100644
--- a/platform/util/src/com/intellij/util/CompressionUtil.java
+++ b/platform/util/src/com/intellij/util/CompressionUtil.java
@@ -63,12 +63,12 @@ public class CompressionUtil {
   public static final boolean DUMP_COMPRESSION_STATS = SystemProperties.getBooleanProperty("idea.dump.compression.stats", false);
 
   public static int writeCompressedWithoutOriginalBufferLength(@NotNull DataOutput out, @NotNull byte[] bytes, int length) throws IOException {
-    long started = System.nanoTime();
+    long started = DUMP_COMPRESSION_STATS ? System.nanoTime() : 0;
 
     final byte[] compressedOutputBuffer = spareBufferLocal.getBuffer(Snappy.maxCompressedLength(length));
     int compressedSize = Snappy.compress(bytes, 0, length, compressedOutputBuffer, 0);
 
-    final long time = System.nanoTime() - started;
+    final long time = (DUMP_COMPRESSION_STATS ? System.nanoTime() : 0) - started;
     mySizeAfterCompression.addAndGet(compressedSize);
     mySizeBeforeCompression.addAndGet(length);
     int requests = myCompressionRequests.incrementAndGet();
@@ -92,11 +92,11 @@ public class CompressionUtil {
     in.readFully(bytes, 0, size);
 
     int decompressedRequests = myDecompressionRequests.incrementAndGet();
-    long started = System.nanoTime();
+    long started = DUMP_COMPRESSION_STATS ? System.nanoTime() : 0;
 
     byte[] decompressedResult = Snappy.uncompress(bytes, 0, size);
 
-    long doneTime = System.nanoTime() - started;
+    long doneTime = (DUMP_COMPRESSION_STATS ? System.nanoTime() : 0) - started;
     long decompressedSize = myDecompressedSize.addAndGet(size);
     long decompressedTime = myDecompressionTime.addAndGet(doneTime);
     if (DUMP_COMPRESSION_STATS && decompressedRequests % 1000 == 0) {
diff --git a/platform/util/src/com/intellij/util/io/PersistentHashMapValueStorage.java b/platform/util/src/com/intellij/util/io/PersistentHashMapValueStorage.java
index 20b168a81fd4..ab1a59128a99 100644
--- a/platform/util/src/com/intellij/util/io/PersistentHashMapValueStorage.java
+++ b/platform/util/src/com/intellij/util/io/PersistentHashMapValueStorage.java
@@ -354,7 +354,7 @@ public class PersistentHashMapValueStorage {
     forceAppender(myPath);
 
     checkCancellation();
-    long startedTime = System.nanoTime();
+    long startedTime = ourDumpChunkRemovalTime ? System.nanoTime() : 0;
     long chunk = tailChunkAddress;
     int chunkCount = 0;
 
@@ -426,7 +426,7 @@ public class PersistentHashMapValueStorage {
 
     if (chunkCount > 1 && !myCompactionMode) {
       checkCancellation();
-      long endCompactionTime = System.nanoTime();
+      long endCompactionTime = ourDumpChunkRemovalTime ? System.nanoTime() : 0;
       long diff = endCompactionTime - startedTime;
 
       myChunksRemovalTime += diff;