cmd/go, doc/go1.3.txt: misc/benchcmp has been replaced by go tool benchcmp

Fixes #7016.

LGTM=r
R=r
CC=adg, bradfitz, dave, golang-codereviews
https://golang.org/cl/60100043

doc/go1.3.txt

@@ -4,3 +4,4 @@ misc/dist: renamed misc/makerelease (CL 39920043)
 runtime: output how long goroutines are blocked (CL 50420043)
 syscall: add NewCallbackCDecl to use for windows callbacks (CL 36180044)
 testing: diagnose buggy tests that panic(nil) (CL 55780043)
+misc/benchcmp has been replaced by go tool benchcmp (CL 47980043)

misc/benchcmp

-#!/bin/sh
-# Copyright 2011 The Go Authors.  All rights reserved.
-# Use of this source code is governed by a BSD-style
-# license that can be found in the LICENSE file.
-
-case "$1" in
--*)	
-	echo 'usage: benchcmp old.txt new.txt' >&2
-	echo >&2
-	echo 'Each input file should be from:' >&2
-	echo '	go test -test.run=NONE -test.bench=. > [old,new].txt' >&2
-	echo >&2
-	echo 'Benchcmp compares the first and last for each benchmark.' >&2
-	echo >&2
-	echo 'If -test.benchmem=true is added to the "go test" command' >&2
-	echo 'benchcmp will also compare memory allocations.' >&2
-	exit 2
-esac
-
-awk '
-BEGIN {
-	n = 0
-}
-
-$1 ~ /Benchmark/ && $4 == "ns/op" {
-	if(old[$1]) {
-		if(!saw[$1]++) {
-			name[n++] = $1
-			if(length($1) > len)
-				len = length($1)
-		}
-		new[$1] = $3
-		if($6 == "MB/s")
-			newmb[$1] = $5
-
-		# allocs/op might be at $8 or $10 depending on if
-		# SetBytes was used or not.
-		# B/op might be at $6 or $8, it should be immediately
-		# followed by allocs/op
-		if($8 == "allocs/op") {
-			newbytes[$1] = $5
-			newalloc[$1] = $7
-		}
-		if($10 == "allocs/op") {
-			newbytes[$1] = $7
-			newalloc[$1] = $9
-		}
-	} else {
-		old[$1] = $3
-		if($6 == "MB/s")
-			oldmb[$1] = $5
-		if($8 == "allocs/op") {
-			oldbytes[$1] = $5
-			oldalloc[$1] = $7
-		}
-		if($10 == "allocs/op") {
-			oldbytes[$1] = $7
-			oldalloc[$1] = $9
-		}
-	}
-}
-
-END {
-	if(n == 0) {
-		print "benchcmp: no repeated benchmarks" >"/dev/stderr"
-		exit 1
-	}
-
-	printf("%-*s %12s %12s  %7s\n", len, "benchmark", "old ns/op", "new ns/op", "delta")
-
-	# print ns/op
-	for(i=0; i<n; i++) {
-		what = name[i]
-		printf("%-*s %12d %12d  %6s%%\n", len, what, old[what], new[what],
-			sprintf("%+.2f", 100*new[what]/old[what]-100))
-	}
-
-	# print mb/s
-	anymb = 0
-	for(i=0; i<n; i++) {
-		what = name[i]
-		if(!(what in newmb))
-			continue
-		if(anymb++ == 0)
-			printf("\n%-*s %12s %12s  %7s\n", len, "benchmark", "old MB/s", "new MB/s", "speedup")
-		printf("%-*s %12s %12s  %6sx\n", len, what,
-			sprintf("%.2f", oldmb[what]),
-			sprintf("%.2f", newmb[what]),
-			sprintf("%.2f", newmb[what]/oldmb[what]))
-	}
-
-	# print allocs
-	anyalloc = 0
-	for(i=0; i<n; i++) {
-		what = name[i]
-		if(!(what in newalloc))
-			continue
-		if(anyalloc++ == 0)
-			printf("\n%-*s %12s %12s  %7s\n", len, "benchmark", "old allocs", "new allocs", "delta")
-		if(oldalloc[what] == 0)
-			delta="n/a"
-		else
-			delta=sprintf("%.2f", 100*newalloc[what]/oldalloc[what]-100)
-		printf("%-*s %12d %12d  %6s%%\n", len, what,
-			oldalloc[what], newalloc[what], delta)
-	}
-
-	# print alloc bytes
-	anybytes = 0
-	for(i=0; i<n; i++) {
-		what = name[i]
-		if(!(what in newbytes))
-			continue
-		if(anybytes++ == 0)
-			printf("\n%-*s %12s %12s  %7s\n", len, "benchmark", "old bytes", "new bytes", "delta")
-		if(oldbytes[what] == 0)
-			delta="n/a"
-		else
-			delta=sprintf("%.2f", 100*newbytes[what]/oldbytes[what]-100)
-		printf("%-*s %12d %12d  %6s%%\n", len, what,
-			oldbytes[what], newbytes[what], delta)
-	}
-}
-' "$@"

src/cmd/go/pkg.go

@@ -304,16 +304,17 @@ const (
 
 // goTools is a map of Go program import path to install target directory.
 var goTools = map[string]targetDir{
-	"cmd/api":                              toTool,
-	"cmd/cgo":                              toTool,
-	"cmd/fix":                              toTool,
-	"cmd/link":                             toTool,
-	"cmd/nm":                               toTool,
-	"cmd/pack":                             toTool,
-	"cmd/yacc":                             toTool,
-	"code.google.com/p/go.tools/cmd/cover": toTool,
-	"code.google.com/p/go.tools/cmd/godoc": toBin,
-	"code.google.com/p/go.tools/cmd/vet":   toTool,
+	"cmd/api":  toTool,
+	"cmd/cgo":  toTool,
+	"cmd/fix":  toTool,
+	"cmd/link": toTool,
+	"cmd/nm":   toTool,
+	"cmd/pack": toTool,
+	"cmd/yacc": toTool,
+	"code.google.com/p/go.tools/cmd/benchcmp": toTool,
+	"code.google.com/p/go.tools/cmd/cover":    toTool,
+	"code.google.com/p/go.tools/cmd/godoc":    toBin,
+	"code.google.com/p/go.tools/cmd/vet":      toTool,
 }
 
 // expandScanner expands a scanner.List error into all the errors in the list.

src/cmd/go/tool.go

@@ -65,7 +65,7 @@ func tool(toolName string) string {
 
 func isInGoToolsRepo(toolName string) bool {
 	switch toolName {
-	case "cover", "vet":
+	case "benchcmp", "cover", "vet":
 		return true
 	}
 	return false