diff options
Diffstat (limited to 'test/garbage/parser.go')
| -rw-r--r-- | test/garbage/parser.go | 36 |
1 files changed, 23 insertions, 13 deletions
diff --git a/test/garbage/parser.go b/test/garbage/parser.go index 3a21f97a8..adb90e468 100644 --- a/test/garbage/parser.go +++ b/test/garbage/parser.go @@ -15,6 +15,7 @@ import ( "path" "runtime" "strings" + "time" ) func isGoFile(dir *os.Dir) bool { @@ -66,26 +67,31 @@ func parseDir(dirpath string) map[string]*ast.Package { func main() { st := &runtime.MemStats - n := flag.Int("n", 10, "iterations") + n := flag.Int("n", 4, "iterations") p := flag.Int("p", len(packages), "# of packages to keep in memory") flag.BoolVar(&st.DebugGC, "d", st.DebugGC, "print GC debugging info (pause times)") flag.Parse() + var t0 int64 pkgroot := os.Getenv("GOROOT") + "/src/pkg/" - for i := -1; i < *n; i++ { - parsed := make([]map[string]*ast.Package, *p) - for j := range parsed { - parsed[j] = parseDir(pkgroot + packages[j%len(packages)]) - } - if i == -1 { - // Now that heap is grown to full size, reset counters. - // This hides the start-up pauses, which are much smaller - // than the normal pauses and would otherwise make - // the average look much better than it actually is. - st.NumGC = 0 - st.PauseNs = 0 + for pass := 0; pass < 2; pass++ { + // Once the heap is grown to full size, reset counters. + // This hides the start-up pauses, which are much smaller + // than the normal pauses and would otherwise make + // the average look much better than it actually is. + st.NumGC = 0 + st.PauseNs = 0 + t0 = time.Nanoseconds() + + for i := 0; i < *n; i++ { + parsed := make([]map[string]*ast.Package, *p) + for j := range parsed { + parsed[j] = parseDir(pkgroot + packages[j%len(packages)]) + } } + runtime.GC() } + t1 := time.Nanoseconds() fmt.Printf("Alloc=%d/%d Heap=%d/%d Mallocs=%d PauseTime=%.3f/%d = %.3f\n", st.Alloc, st.TotalAlloc, @@ -97,6 +103,10 @@ func main() { for _, s := range st.BySize { fmt.Printf("%10d %10d %10d\n", s.Size, s.Mallocs, s.Frees) } + + // Standard gotest benchmark output, collected by build dashboard. + fmt.Printf("garbage.BenchmarkParser %d %d ns/op\n", *n, (t1-t0)/int64(*n)) + fmt.Printf("garbage.BenchmarkParserPause %d %d ns/op\n", st.NumGC, int64(st.PauseNs)/int64(st.NumGC)) } |