From: Russ Cox <rsc@golang.org>
Date: Mon, 20 Feb 2012 03:13:04 +0000 (-0500)
Subject: strconv: run garbage collection before counting allocations in test
X-Git-Tag: weekly.2012-02-22~84
X-Git-Url: http://www.git.cypherpunks.su/?a=commitdiff_plain;h=a53317668a9b29cf4633e67d1d83947eee92c951;p=gostls13.git

strconv: run garbage collection before counting allocations in test

My theory is that the call to f() allocates, which triggers
a garbage collection, which itself may do some allocation,
which is being counted.  Running a garbage collection
before starting the test should avoid this problem.

Fixes #2894 (I hope).

R=golang-dev, bradfitz, nigeltao
CC=golang-dev
https://golang.org/cl/5685046
---

diff --git a/src/pkg/strconv/itoa_test.go b/src/pkg/strconv/itoa_test.go
index 6687314d2f..1486ee214d 100644
--- a/src/pkg/strconv/itoa_test.go
+++ b/src/pkg/strconv/itoa_test.go
@@ -127,6 +127,7 @@ func TestUitoa(t *testing.T) {
 }
 
 func numAllocations(f func()) int {
+	runtime.GC()
 	memstats := new(runtime.MemStats)
 	runtime.ReadMemStats(memstats)
 	n0 := memstats.Mallocs