X Benchmarks + plot for Fannkuch 11

See https://github.com/golang/go/issues/18977 for context.

src/testing/testing.go

@@ -442,6 +442,7 @@ func (c *common) Fail() {
 	defer c.mu.Unlock()
 	// c.done needs to be locked to synchronize checks to c.done in parent tests.
 	if c.done {
+		zzz()
 		panic("Fail in goroutine after " + c.name + " has completed")
 	}
 	c.failed = true

test/bench/go1/.gitignore

+go1.test

test/bench/go1/fannkuch-entryshifted

+#!/bin/bash -e
+# compile/run Fannkuch11 benchmark with fannkuch() entry point shifted by various N
+
+# shiftby n shiftfile
+# makes fannkuch entrypoint to be shifted by ~ n*16 bytes
+shiftby() {
+	n=$1
+	out=$2
+	echo "package testing"		>$out
+	echo				>>$out
+	echo "// shifting by ~ $n·16"	>>$out
+	echo "func zzz() {"		>>$out
+	for i in `seq $n`; do
+		echo -e "\tprintln()"	>>$out
+	done
+	echo "}"			>>$out
+}
+
+
+# benchit go name shiftfile
+benchit() {
+	go=$1
+	name=$2
+	shiftfile=$3
+
+	for i in `seq 0 32`; do
+		echo "@$i"
+		shiftby $i $shiftfile
+		out=$name/`printf %04d $i`
+		mkdir -p $out
+		$go test -c -o $out/go1.test
+
+		$go tool objdump -s fannkuch $out/go1.test 2>/dev/null |head -2 | tail -1 |tee $out/entry.txt
+
+		$out/go1.test -test.run=Bench -test.bench=Fannkuch11 -test.count=5 |tee $out/bench.txt
+	done
+}
+
+
+#benchit go18 go18			../../../src/testing/zzz.go
+benchit go go-4b0d74f8			../../../../go/src/testing/zzz.go
+#benchit go go-4b0d74f8+cl43491.3	../../../../go/src/testing/zzz.go

test/bench/go1/go-4b0d74f8+cl43491.3/0000/bench.txt

+goos: linux
+goarch: amd64
+BenchmarkFannkuch11-4   	       1	2918436214 ns/op
+BenchmarkFannkuch11-4   	       1	2900622300 ns/op
+BenchmarkFannkuch11-4   	       1	2901749082 ns/op
+BenchmarkFannkuch11-4   	       1	2940830409 ns/op
+BenchmarkFannkuch11-4   	       1	2912478121 ns/op
+PASS

test/bench/go1/go-4b0d74f8+cl43491.3/0000/entry.txt

+  fannkuch_test.go:12	0x75f0a0		64488b0c25f8ffffff		MOVQ FS:0xfffffff8, CX						

test/bench/go1/go-4b0d74f8+cl43491.3/0001/bench.txt

+goos: linux
+goarch: amd64
+BenchmarkFannkuch11-4   	       1	2910932249 ns/op
+BenchmarkFannkuch11-4   	       1	2917028086 ns/op
+BenchmarkFannkuch11-4   	       1	2911561535 ns/op
+BenchmarkFannkuch11-4   	       1	2906550483 ns/op
+BenchmarkFannkuch11-4   	       1	2914845415 ns/op
+PASS

test/bench/go1/go-4b0d74f8+cl43491.3/0001/entry.txt

+  fannkuch_test.go:12	0x75f0c0		64488b0c25f8ffffff		MOVQ FS:0xfffffff8, CX						

test/bench/go1/go-4b0d74f8+cl43491.3/0002/bench.txt

+goos: linux
+goarch: amd64
+BenchmarkFannkuch11-4   	       1	2969279548 ns/op
+BenchmarkFannkuch11-4   	       1	2982046012 ns/op
+BenchmarkFannkuch11-4   	       1	2968881122 ns/op
+BenchmarkFannkuch11-4   	       1	2969440498 ns/op
+BenchmarkFannkuch11-4   	       1	2972453916 ns/op
+PASS

test/bench/go1/go-4b0d74f8+cl43491.3/0002/entry.txt

+  fannkuch_test.go:12	0x75f0d0		64488b0c25f8ffffff		MOVQ FS:0xfffffff8, CX						

test/bench/go1/go-4b0d74f8+cl43491.3/0003/bench.txt

+goos: linux
+goarch: amd64
+BenchmarkFannkuch11-4   	       1	2899131835 ns/op
+BenchmarkFannkuch11-4   	       1	2898111879 ns/op
+BenchmarkFannkuch11-4   	       1	2898821692 ns/op
+BenchmarkFannkuch11-4   	       1	2901318488 ns/op
+BenchmarkFannkuch11-4   	       1	2902301351 ns/op
+PASS

test/bench/go1/go-4b0d74f8+cl43491.3/0003/entry.txt

+  fannkuch_test.go:12	0x75f0e0		64488b0c25f8ffffff		MOVQ FS:0xfffffff8, CX						

test/bench/go1/go-4b0d74f8+cl43491.3/0004/bench.txt

+goos: linux
+goarch: amd64
+BenchmarkFannkuch11-4   	       1	3187864273 ns/op
+BenchmarkFannkuch11-4   	       1	3157959997 ns/op
+BenchmarkFannkuch11-4   	       1	3170501573 ns/op
+BenchmarkFannkuch11-4   	       1	3181285380 ns/op
+BenchmarkFannkuch11-4   	       1	3184053028 ns/op
+PASS

test/bench/go1/go-4b0d74f8+cl43491.3/0004/entry.txt

+  fannkuch_test.go:12	0x75f0f0		64488b0c25f8ffffff		MOVQ FS:0xfffffff8, CX						

test/bench/go1/go-4b0d74f8+cl43491.3/0005/bench.txt

+goos: linux
+goarch: amd64
+BenchmarkFannkuch11-4   	       1	3160267313 ns/op
+BenchmarkFannkuch11-4   	       1	3166786529 ns/op
+BenchmarkFannkuch11-4   	       1	3159912207 ns/op
+BenchmarkFannkuch11-4   	       1	3166717417 ns/op
+BenchmarkFannkuch11-4   	       1	3173389835 ns/op
+PASS

test/bench/go1/go-4b0d74f8+cl43491.3/0005/entry.txt

+  fannkuch_test.go:12	0x75f0f0		64488b0c25f8ffffff		MOVQ FS:0xfffffff8, CX						

test/bench/go1/go-4b0d74f8+cl43491.3/0006/bench.txt

+goos: linux
+goarch: amd64
+BenchmarkFannkuch11-4   	       1	2917219766 ns/op
+BenchmarkFannkuch11-4   	       1	2912608548 ns/op
+BenchmarkFannkuch11-4   	       1	2926319633 ns/op
+BenchmarkFannkuch11-4   	       1	2904263281 ns/op
+BenchmarkFannkuch11-4   	       1	2903771227 ns/op
+PASS

test/bench/go1/go-4b0d74f8+cl43491.3/0006/entry.txt

+  fannkuch_test.go:12	0x75f100		64488b0c25f8ffffff		MOVQ FS:0xfffffff8, CX						

test/bench/go1/go-4b0d74f8+cl43491.3/0007/bench.txt

+goos: linux
+goarch: amd64
+BenchmarkFannkuch11-4   	       1	2981027970 ns/op
+BenchmarkFannkuch11-4   	       1	2980660016 ns/op
+BenchmarkFannkuch11-4   	       1	2980530272 ns/op
+BenchmarkFannkuch11-4   	       1	3007247593 ns/op
+BenchmarkFannkuch11-4   	       1	2976470502 ns/op
+PASS

test/bench/go1/go-4b0d74f8+cl43491.3/0007/entry.txt

+  fannkuch_test.go:12	0x75f110		64488b0c25f8ffffff		MOVQ FS:0xfffffff8, CX						

test/bench/go1/go-4b0d74f8+cl43491.3/0008/bench.txt

+goos: linux
+goarch: amd64
+BenchmarkFannkuch11-4   	       1	2895980630 ns/op
+BenchmarkFannkuch11-4   	       1	2898159941 ns/op
+BenchmarkFannkuch11-4   	       1	2892238889 ns/op
+BenchmarkFannkuch11-4   	       1	2893411950 ns/op
+BenchmarkFannkuch11-4   	       1	2893053332 ns/op
+PASS

test/bench/go1/go-4b0d74f8+cl43491.3/0008/entry.txt

+  fannkuch_test.go:12	0x75f120		64488b0c25f8ffffff		MOVQ FS:0xfffffff8, CX						

test/bench/go1/go-4b0d74f8+cl43491.3/0009/bench.txt

+goos: linux
+goarch: amd64
+BenchmarkFannkuch11-4   	       1	3199979861 ns/op
+BenchmarkFannkuch11-4   	       1	3204897050 ns/op
+BenchmarkFannkuch11-4   	       1	3197973361 ns/op
+BenchmarkFannkuch11-4   	       1	3196750954 ns/op
+BenchmarkFannkuch11-4   	       1	3196557217 ns/op
+PASS

test/bench/go1/go-4b0d74f8+cl43491.3/0009/entry.txt

+  fannkuch_test.go:12	0x75f130		64488b0c25f8ffffff		MOVQ FS:0xfffffff8, CX						

test/bench/go1/go-4b0d74f8+cl43491.3/0010/bench.txt

+goos: linux
+goarch: amd64
+BenchmarkFannkuch11-4   	       1	2898708638 ns/op
+BenchmarkFannkuch11-4   	       1	2926887169 ns/op
+BenchmarkFannkuch11-4   	       1	2951930047 ns/op
+BenchmarkFannkuch11-4   	       1	2951991342 ns/op
+BenchmarkFannkuch11-4   	       1	2955148727 ns/op
+PASS

test/bench/go1/go-4b0d74f8+cl43491.3/0010/entry.txt

+  fannkuch_test.go:12	0x75f140		64488b0c25f8ffffff		MOVQ FS:0xfffffff8, CX						

test/bench/go1/go-4b0d74f8+cl43491.3/0011/bench.txt

+goos: linux
+goarch: amd64
+BenchmarkFannkuch11-4   	       1	2978927780 ns/op
+BenchmarkFannkuch11-4   	       1	2975175040 ns/op
+BenchmarkFannkuch11-4   	       1	3005095704 ns/op
+BenchmarkFannkuch11-4   	       1	2962754892 ns/op
+BenchmarkFannkuch11-4   	       1	2965871016 ns/op
+PASS

test/bench/go1/go-4b0d74f8+cl43491.3/0011/entry.txt

+  fannkuch_test.go:12	0x75f150		64488b0c25f8ffffff		MOVQ FS:0xfffffff8, CX						

test/bench/go1/go-4b0d74f8+cl43491.3/0012/bench.txt

+goos: linux
+goarch: amd64
+BenchmarkFannkuch11-4   	       1	2896687033 ns/op
+BenchmarkFannkuch11-4   	       1	2895414812 ns/op
+BenchmarkFannkuch11-4   	       1	2936742828 ns/op
+BenchmarkFannkuch11-4   	       1	2894991702 ns/op
+BenchmarkFannkuch11-4   	       1	2898672409 ns/op
+PASS

test/bench/go1/go-4b0d74f8+cl43491.3/0012/entry.txt

+  fannkuch_test.go:12	0x75f160		64488b0c25f8ffffff		MOVQ FS:0xfffffff8, CX						

test/bench/go1/go-4b0d74f8+cl43491.3/0013/bench.txt

+goos: linux
+goarch: amd64
+BenchmarkFannkuch11-4   	       1	2969497580 ns/op
+BenchmarkFannkuch11-4   	       1	2971730578 ns/op
+BenchmarkFannkuch11-4   	       1	2957126679 ns/op
+BenchmarkFannkuch11-4   	       1	2970083017 ns/op
+BenchmarkFannkuch11-4   	       1	2969750664 ns/op
+PASS

test/bench/go1/go-4b0d74f8+cl43491.3/0013/entry.txt

+  fannkuch_test.go:12	0x75f170		64488b0c25f8ffffff		MOVQ FS:0xfffffff8, CX						

test/bench/go1/go-4b0d74f8+cl43491.3/0014/bench.txt

+goos: linux
+goarch: amd64
+BenchmarkFannkuch11-4   	       1	2937377059 ns/op
+BenchmarkFannkuch11-4   	       1	2932927018 ns/op
+BenchmarkFannkuch11-4   	       1	2946572249 ns/op
+BenchmarkFannkuch11-4   	       1	2976339923 ns/op
+BenchmarkFannkuch11-4   	       1	2973225335 ns/op
+PASS

test/bench/go1/go-4b0d74f8+cl43491.3/0014/entry.txt

+  fannkuch_test.go:12	0x75f180		64488b0c25f8ffffff		MOVQ FS:0xfffffff8, CX						

test/bench/go1/go-4b0d74f8+cl43491.3/0015/bench.txt

+goos: linux
+goarch: amd64
+BenchmarkFannkuch11-4   	       1	2984930442 ns/op
+BenchmarkFannkuch11-4   	       1	2984748318 ns/op
+BenchmarkFannkuch11-4   	       1	2981730583 ns/op
+BenchmarkFannkuch11-4   	       1	2973675938 ns/op
+BenchmarkFannkuch11-4   	       1	2994923868 ns/op
+PASS

test/bench/go1/go-4b0d74f8+cl43491.3/0015/entry.txt

+  fannkuch_test.go:12	0x75f190		64488b0c25f8ffffff		MOVQ FS:0xfffffff8, CX						

test/bench/go1/go-4b0d74f8+cl43491.3/0016/bench.txt

+goos: linux
+goarch: amd64
+BenchmarkFannkuch11-4   	       1	2929176521 ns/op
+BenchmarkFannkuch11-4   	       1	2913532526 ns/op
+BenchmarkFannkuch11-4   	       1	2973457484 ns/op
+BenchmarkFannkuch11-4   	       1	2902495334 ns/op
+BenchmarkFannkuch11-4   	       1	2932511322 ns/op
+PASS

test/bench/go1/go-4b0d74f8+cl43491.3/0016/entry.txt

+  fannkuch_test.go:12	0x75f1a0		64488b0c25f8ffffff		MOVQ FS:0xfffffff8, CX						

test/bench/go1/go-4b0d74f8+cl43491.3/0017/bench.txt

+goos: linux
+goarch: amd64
+BenchmarkFannkuch11-4   	       1	2971671145 ns/op
+BenchmarkFannkuch11-4   	       1	2966759185 ns/op
+BenchmarkFannkuch11-4   	       1	2957540067 ns/op
+BenchmarkFannkuch11-4   	       1	2966356886 ns/op
+BenchmarkFannkuch11-4   	       1	2967177639 ns/op
+PASS

test/bench/go1/go-4b0d74f8+cl43491.3/0017/entry.txt

+  fannkuch_test.go:12	0x75f1b0		64488b0c25f8ffffff		MOVQ FS:0xfffffff8, CX						

test/bench/go1/go-4b0d74f8+cl43491.3/0018/bench.txt

+goos: linux
+goarch: amd64
+BenchmarkFannkuch11-4   	       1	2910062202 ns/op
+BenchmarkFannkuch11-4   	       1	2914911477 ns/op
+BenchmarkFannkuch11-4   	       1	2896082928 ns/op
+BenchmarkFannkuch11-4   	       1	2910682055 ns/op
+BenchmarkFannkuch11-4   	       1	2936942068 ns/op
+PASS

test/bench/go1/go-4b0d74f8+cl43491.3/0018/entry.txt

+  fannkuch_test.go:12	0x75f1c0		64488b0c25f8ffffff		MOVQ FS:0xfffffff8, CX						

test/bench/go1/go-4b0d74f8+cl43491.3/0019/bench.txt

+goos: linux
+goarch: amd64
+BenchmarkFannkuch11-4   	       1	2976725760 ns/op
+BenchmarkFannkuch11-4   	       1	2975062828 ns/op
+BenchmarkFannkuch11-4   	       1	3007592984 ns/op
+BenchmarkFannkuch11-4   	       1	2982302518 ns/op
+BenchmarkFannkuch11-4   	       1	2976944205 ns/op
+PASS

test/bench/go1/go-4b0d74f8+cl43491.3/0019/entry.txt

+  fannkuch_test.go:12	0x75f1d0		64488b0c25f8ffffff		MOVQ FS:0xfffffff8, CX						

test/bench/go1/go-4b0d74f8+cl43491.3/0020/bench.txt

+goos: linux
+goarch: amd64
+BenchmarkFannkuch11-4   	       1	2908567988 ns/op
+BenchmarkFannkuch11-4   	       1	2889760201 ns/op
+BenchmarkFannkuch11-4   	       1	2905272323 ns/op
+BenchmarkFannkuch11-4   	       1	2905559271 ns/op
+BenchmarkFannkuch11-4   	       1	2900593896 ns/op
+PASS

test/bench/go1/go-4b0d74f8+cl43491.3/0020/entry.txt

+  fannkuch_test.go:12	0x75f1e0		64488b0c25f8ffffff		MOVQ FS:0xfffffff8, CX						

test/bench/go1/go-4b0d74f8+cl43491.3/0021/bench.txt

+goos: linux
+goarch: amd64
+BenchmarkFannkuch11-4   	       1	2927760909 ns/op
+BenchmarkFannkuch11-4   	       1	2909095244 ns/op
+BenchmarkFannkuch11-4   	       1	2900876425 ns/op
+BenchmarkFannkuch11-4   	       1	2894049671 ns/op
+BenchmarkFannkuch11-4   	       1	2919675164 ns/op
+PASS

test/bench/go1/go-4b0d74f8+cl43491.3/0021/entry.txt

+  fannkuch_test.go:12	0x75f1e0		64488b0c25f8ffffff		MOVQ FS:0xfffffff8, CX						

test/bench/go1/go-4b0d74f8+cl43491.3/0022/bench.txt

+goos: linux
+goarch: amd64
+BenchmarkFannkuch11-4   	       1	3196107859 ns/op
+BenchmarkFannkuch11-4   	       1	3195859183 ns/op
+BenchmarkFannkuch11-4   	       1	3188823584 ns/op
+BenchmarkFannkuch11-4   	       1	3200426724 ns/op
+BenchmarkFannkuch11-4   	       1	3185179596 ns/op
+PASS

test/bench/go1/go-4b0d74f8+cl43491.3/0022/entry.txt

+  fannkuch_test.go:12	0x75f1f0		64488b0c25f8ffffff		MOVQ FS:0xfffffff8, CX						

test/bench/go1/go-4b0d74f8+cl43491.3/0023/bench.txt

+goos: linux
+goarch: amd64
+BenchmarkFannkuch11-4   	       1	2897050417 ns/op
+BenchmarkFannkuch11-4   	       1	2901809167 ns/op
+BenchmarkFannkuch11-4   	       1	2889645754 ns/op
+BenchmarkFannkuch11-4   	       1	2900429305 ns/op
+BenchmarkFannkuch11-4   	       1	2932811046 ns/op
+PASS

test/bench/go1/go-4b0d74f8+cl43491.3/0023/entry.txt

+  fannkuch_test.go:12	0x75f200		64488b0c25f8ffffff		MOVQ FS:0xfffffff8, CX						

test/bench/go1/go-4b0d74f8+cl43491.3/0024/bench.txt

+goos: linux
+goarch: amd64
+BenchmarkFannkuch11-4   	       1	2974710118 ns/op
+BenchmarkFannkuch11-4   	       1	2979019304 ns/op
+BenchmarkFannkuch11-4   	       1	2992623409 ns/op
+BenchmarkFannkuch11-4   	       1	3004464307 ns/op
+BenchmarkFannkuch11-4   	       1	2982677048 ns/op
+PASS

test/bench/go1/go-4b0d74f8+cl43491.3/0024/entry.txt

+  fannkuch_test.go:12	0x75f210		64488b0c25f8ffffff		MOVQ FS:0xfffffff8, CX						

test/bench/go1/go-4b0d74f8+cl43491.3/0025/bench.txt

+goos: linux
+goarch: amd64
+BenchmarkFannkuch11-4   	       1	2903064033 ns/op
+BenchmarkFannkuch11-4   	       1	2880045453 ns/op
+BenchmarkFannkuch11-4   	       1	2886469797 ns/op
+BenchmarkFannkuch11-4   	       1	2890022591 ns/op
+BenchmarkFannkuch11-4   	       1	2884570198 ns/op
+PASS

test/bench/go1/go-4b0d74f8+cl43491.3/0025/entry.txt

+  fannkuch_test.go:12	0x75f220		64488b0c25f8ffffff		MOVQ FS:0xfffffff8, CX						

test/bench/go1/go-4b0d74f8+cl43491.3/0026/bench.txt

+goos: linux
+goarch: amd64
+BenchmarkFannkuch11-4   	       1	3218254762 ns/op
+BenchmarkFannkuch11-4   	       1	3226318363 ns/op
+BenchmarkFannkuch11-4   	       1	3222877165 ns/op
+BenchmarkFannkuch11-4   	       1	3221487957 ns/op
+BenchmarkFannkuch11-4   	       1	3229588709 ns/op
+PASS

test/bench/go1/go-4b0d74f8+cl43491.3/0026/entry.txt

+  fannkuch_test.go:12	0x75f230		64488b0c25f8ffffff		MOVQ FS:0xfffffff8, CX						

test/bench/go1/go-4b0d74f8+cl43491.3/0027/bench.txt

+goos: linux
+goarch: amd64
+BenchmarkFannkuch11-4   	       1	2907254953 ns/op
+BenchmarkFannkuch11-4   	       1	2905373511 ns/op
+BenchmarkFannkuch11-4   	       1	2906329692 ns/op
+BenchmarkFannkuch11-4   	       1	2913144944 ns/op
+BenchmarkFannkuch11-4   	       1	2909097649 ns/op
+PASS

test/bench/go1/go-4b0d74f8+cl43491.3/0027/entry.txt

+  fannkuch_test.go:12	0x75f240		64488b0c25f8ffffff		MOVQ FS:0xfffffff8, CX						

test/bench/go1/go-4b0d74f8+cl43491.3/0028/bench.txt

+goos: linux
+goarch: amd64
+BenchmarkFannkuch11-4   	       1	2973946051 ns/op
+BenchmarkFannkuch11-4   	       1	2970301654 ns/op
+BenchmarkFannkuch11-4   	       1	2961103720 ns/op
+BenchmarkFannkuch11-4   	       1	2987705081 ns/op
+BenchmarkFannkuch11-4   	       1	2992736424 ns/op
+PASS

test/bench/go1/go-4b0d74f8+cl43491.3/0028/entry.txt

+  fannkuch_test.go:12	0x75f250		64488b0c25f8ffffff		MOVQ FS:0xfffffff8, CX						

test/bench/go1/go-4b0d74f8+cl43491.3/0029/bench.txt

+goos: linux
+goarch: amd64
+BenchmarkFannkuch11-4   	       1	2895340083 ns/op
+BenchmarkFannkuch11-4   	       1	2894641118 ns/op
+BenchmarkFannkuch11-4   	       1	2895871997 ns/op
+BenchmarkFannkuch11-4   	       1	2899767962 ns/op
+BenchmarkFannkuch11-4   	       1	2892486994 ns/op
+PASS

test/bench/go1/go-4b0d74f8+cl43491.3/0029/entry.txt

+  fannkuch_test.go:12	0x75f260		64488b0c25f8ffffff		MOVQ FS:0xfffffff8, CX						

test/bench/go1/go-4b0d74f8+cl43491.3/0030/bench.txt

+goos: linux
+goarch: amd64
+BenchmarkFannkuch11-4   	       1	2972379488 ns/op
+BenchmarkFannkuch11-4   	       1	2979657151 ns/op
+BenchmarkFannkuch11-4   	       1	2990920763 ns/op
+BenchmarkFannkuch11-4   	       1	2976374396 ns/op
+BenchmarkFannkuch11-4   	       1	2983636143 ns/op
+PASS

test/bench/go1/go-4b0d74f8+cl43491.3/0030/entry.txt

+  fannkuch_test.go:12	0x75f270		64488b0c25f8ffffff		MOVQ FS:0xfffffff8, CX						

test/bench/go1/go-4b0d74f8+cl43491.3/0031/bench.txt

+goos: linux
+goarch: amd64
+BenchmarkFannkuch11-4   	       1	2925643768 ns/op
+BenchmarkFannkuch11-4   	       1	2937395024 ns/op
+BenchmarkFannkuch11-4   	       1	2929494060 ns/op
+BenchmarkFannkuch11-4   	       1	2924534360 ns/op
+BenchmarkFannkuch11-4   	       1	2976600260 ns/op
+PASS

test/bench/go1/go-4b0d74f8+cl43491.3/0031/entry.txt

+  fannkuch_test.go:12	0x75f280		64488b0c25f8ffffff		MOVQ FS:0xfffffff8, CX						

test/bench/go1/go-4b0d74f8+cl43491.3/0032/bench.txt

+goos: linux
+goarch: amd64
+BenchmarkFannkuch11-4   	       1	3011316057 ns/op
+BenchmarkFannkuch11-4   	       1	2985688209 ns/op
+BenchmarkFannkuch11-4   	       1	2979548202 ns/op
+BenchmarkFannkuch11-4   	       1	3023891223 ns/op
+BenchmarkFannkuch11-4   	       1	2987030504 ns/op
+PASS

test/bench/go1/go-4b0d74f8+cl43491.3/0032/entry.txt

+  fannkuch_test.go:12	0x75f290		64488b0c25f8ffffff		MOVQ FS:0xfffffff8, CX						

test/bench/go1/go-4b0d74f8/0000/bench.txt

+goos: linux
+goarch: amd64
+BenchmarkFannkuch11-4   	       1	2786354969 ns/op
+BenchmarkFannkuch11-4   	       1	2795275294 ns/op
+BenchmarkFannkuch11-4   	       1	2794738310 ns/op
+BenchmarkFannkuch11-4   	       1	2790130512 ns/op
+BenchmarkFannkuch11-4   	       1	2793541039 ns/op
+PASS

test/bench/go1/go-4b0d74f8/0000/entry.txt

+  fannkuch_test.go:12	0x75fdd0		64488b0c25f8ffffff		MOVQ FS:0xfffffff8, CX						

test/bench/go1/go-4b0d74f8/0001/bench.txt

+goos: linux
+goarch: amd64
+BenchmarkFannkuch11-4   	       1	2780707681 ns/op
+BenchmarkFannkuch11-4   	       1	2780152991 ns/op
+BenchmarkFannkuch11-4   	       1	2785385985 ns/op
+BenchmarkFannkuch11-4   	       1	2791216058 ns/op
+BenchmarkFannkuch11-4   	       1	2783350347 ns/op
+PASS

test/bench/go1/go-4b0d74f8/0001/entry.txt

+  fannkuch_test.go:12	0x75fdf0		64488b0c25f8ffffff		MOVQ FS:0xfffffff8, CX						

test/bench/go1/go-4b0d74f8/0002/bench.txt

+goos: linux
+goarch: amd64
+BenchmarkFannkuch11-4   	       1	2833356065 ns/op
+BenchmarkFannkuch11-4   	       1	2847146732 ns/op
+BenchmarkFannkuch11-4   	       1	2834043475 ns/op
+BenchmarkFannkuch11-4   	       1	2841449834 ns/op
+BenchmarkFannkuch11-4   	       1	2841662567 ns/op
+PASS

test/bench/go1/go-4b0d74f8/0002/entry.txt

+  fannkuch_test.go:12	0x75fe00		64488b0c25f8ffffff		MOVQ FS:0xfffffff8, CX						

test/bench/go1/go-4b0d74f8/0003/bench.txt

+goos: linux
+goarch: amd64
+BenchmarkFannkuch11-4   	       1	2788504361 ns/op
+BenchmarkFannkuch11-4   	       1	2809629356 ns/op
+BenchmarkFannkuch11-4   	       1	2787783506 ns/op
+BenchmarkFannkuch11-4   	       1	2798952407 ns/op
+BenchmarkFannkuch11-4   	       1	2793861985 ns/op
+PASS

test/bench/go1/go-4b0d74f8/0003/entry.txt

+  fannkuch_test.go:12	0x75fe10		64488b0c25f8ffffff		MOVQ FS:0xfffffff8, CX						

test/bench/go1/go-4b0d74f8/0004/bench.txt

+goos: linux
+goarch: amd64
+BenchmarkFannkuch11-4   	       1	2888618798 ns/op
+BenchmarkFannkuch11-4   	       1	2886051141 ns/op
+BenchmarkFannkuch11-4   	       1	2877131596 ns/op
+BenchmarkFannkuch11-4   	       1	2884219690 ns/op
+BenchmarkFannkuch11-4   	       1	2886633384 ns/op
+PASS

test/bench/go1/go-4b0d74f8/0004/entry.txt

+  fannkuch_test.go:12	0x75fe20		64488b0c25f8ffffff		MOVQ FS:0xfffffff8, CX						

test/bench/go1/go-4b0d74f8/0005/bench.txt

+goos: linux
+goarch: amd64
+BenchmarkFannkuch11-4   	       1	2885210377 ns/op
+BenchmarkFannkuch11-4   	       1	2884819497 ns/op
+BenchmarkFannkuch11-4   	       1	2885108372 ns/op
+BenchmarkFannkuch11-4   	       1	2882805254 ns/op
+BenchmarkFannkuch11-4   	       1	2886113494 ns/op
+PASS

test/bench/go1/go-4b0d74f8/0005/entry.txt

+  fannkuch_test.go:12	0x75fe20		64488b0c25f8ffffff		MOVQ FS:0xfffffff8, CX						

test/bench/go1/go-4b0d74f8/0006/bench.txt

+goos: linux
+goarch: amd64
+BenchmarkFannkuch11-4   	       1	2791775737 ns/op
+BenchmarkFannkuch11-4   	       1	2781333251 ns/op
+BenchmarkFannkuch11-4   	       1	2812540270 ns/op
+BenchmarkFannkuch11-4   	       1	2788504984 ns/op
+BenchmarkFannkuch11-4   	       1	2782203630 ns/op
+PASS

test/bench/go1/go-4b0d74f8/0006/entry.txt

+  fannkuch_test.go:12	0x75fe30		64488b0c25f8ffffff		MOVQ FS:0xfffffff8, CX						

test/bench/go1/go-4b0d74f8/0007/bench.txt

+goos: linux
+goarch: amd64
+BenchmarkFannkuch11-4   	       1	2831376384 ns/op
+BenchmarkFannkuch11-4   	       1	2812827485 ns/op
+BenchmarkFannkuch11-4   	       1	2814649422 ns/op
+BenchmarkFannkuch11-4   	       1	2810927789 ns/op
+BenchmarkFannkuch11-4   	       1	2837558438 ns/op
+PASS

test/bench/go1/go-4b0d74f8/0007/entry.txt

+  fannkuch_test.go:12	0x75fe40		64488b0c25f8ffffff		MOVQ FS:0xfffffff8, CX						

test/bench/go1/go-4b0d74f8/0008/bench.txt

+goos: linux
+goarch: amd64
+BenchmarkFannkuch11-4   	       1	2795853760 ns/op
+BenchmarkFannkuch11-4   	       1	2797204622 ns/op
+BenchmarkFannkuch11-4   	       1	2828225217 ns/op
+BenchmarkFannkuch11-4   	       1	2792904347 ns/op
+BenchmarkFannkuch11-4   	       1	2793934777 ns/op
+PASS

test/bench/go1/go-4b0d74f8/0008/entry.txt

+  fannkuch_test.go:12	0x75fe50		64488b0c25f8ffffff		MOVQ FS:0xfffffff8, CX						

test/bench/go1/go-4b0d74f8/0009/bench.txt

+goos: linux
+goarch: amd64
+BenchmarkFannkuch11-4   	       1	2888767327 ns/op
+BenchmarkFannkuch11-4   	       1	2888508441 ns/op
+BenchmarkFannkuch11-4   	       1	2886122707 ns/op
+BenchmarkFannkuch11-4   	       1	2884470963 ns/op
+BenchmarkFannkuch11-4   	       1	2889014444 ns/op
+PASS

test/bench/go1/go-4b0d74f8/0009/entry.txt

+  fannkuch_test.go:12	0x75fe60		64488b0c25f8ffffff		MOVQ FS:0xfffffff8, CX						

test/bench/go1/go-4b0d74f8/0010/bench.txt

+goos: linux
+goarch: amd64
+BenchmarkFannkuch11-4   	       1	3002530458 ns/op
+BenchmarkFannkuch11-4   	       1	3005790466 ns/op
+BenchmarkFannkuch11-4   	       1	3010252938 ns/op
+BenchmarkFannkuch11-4   	       1	3006637038 ns/op
+BenchmarkFannkuch11-4   	       1	3000309886 ns/op
+PASS

test/bench/go1/go-4b0d74f8/0010/entry.txt

+  fannkuch_test.go:12	0x75fe70		64488b0c25f8ffffff		MOVQ FS:0xfffffff8, CX						

test/bench/go1/go-4b0d74f8/0011/bench.txt

+goos: linux
+goarch: amd64
+BenchmarkFannkuch11-4   	       1	2834043150 ns/op
+BenchmarkFannkuch11-4   	       1	2837645567 ns/op
+BenchmarkFannkuch11-4   	       1	2834813403 ns/op
+BenchmarkFannkuch11-4   	       1	2840732873 ns/op
+BenchmarkFannkuch11-4   	       1	2837065841 ns/op
+PASS

test/bench/go1/go-4b0d74f8/0011/entry.txt

+  fannkuch_test.go:12	0x75fe80		64488b0c25f8ffffff		MOVQ FS:0xfffffff8, CX						

test/bench/go1/go-4b0d74f8/0012/bench.txt

+goos: linux
+goarch: amd64
+BenchmarkFannkuch11-4   	       1	2994328072 ns/op
+BenchmarkFannkuch11-4   	       1	2982622704 ns/op
+BenchmarkFannkuch11-4   	       1	2987348373 ns/op
+BenchmarkFannkuch11-4   	       1	2993663893 ns/op
+BenchmarkFannkuch11-4   	       1	3001205192 ns/op
+PASS

test/bench/go1/go-4b0d74f8/0012/entry.txt

+  fannkuch_test.go:12	0x75fe90		64488b0c25f8ffffff		MOVQ FS:0xfffffff8, CX						

test/bench/go1/go-4b0d74f8/0013/bench.txt

+goos: linux
+goarch: amd64
+BenchmarkFannkuch11-4   	       1	2898949568 ns/op
+BenchmarkFannkuch11-4   	       1	2892745759 ns/op
+BenchmarkFannkuch11-4   	       1	2892382691 ns/op
+BenchmarkFannkuch11-4   	       1	2914229556 ns/op
+BenchmarkFannkuch11-4   	       1	2891773429 ns/op
+PASS

test/bench/go1/go-4b0d74f8/0013/entry.txt

+  fannkuch_test.go:12	0x75fea0		64488b0c25f8ffffff		MOVQ FS:0xfffffff8, CX						

test/bench/go1/go-4b0d74f8/0014/bench.txt

+goos: linux
+goarch: amd64
+BenchmarkFannkuch11-4   	       1	2807318915 ns/op
+BenchmarkFannkuch11-4   	       1	2802974323 ns/op
+BenchmarkFannkuch11-4   	       1	2793264194 ns/op
+BenchmarkFannkuch11-4   	       1	2828864858 ns/op
+BenchmarkFannkuch11-4   	       1	2806454663 ns/op
+PASS

test/bench/go1/go-4b0d74f8/0014/entry.txt

+  fannkuch_test.go:12	0x75feb0		64488b0c25f8ffffff		MOVQ FS:0xfffffff8, CX