felixge

package main

import (
	"bytes"
	"compress/gzip"
	"io"
	"os"
	"testing"
)

felixge

$ curl 'http://169.254.169.254/latest/meta-data/instance-type'
c6g.metal
$ go version
go version go1.19.3 linux/arm64
$ go test -run='^$' -cpu=1,2,4,8,16,32,64 -bench . -count=30 -timeout=0 | tee bench.txt
$ benchstat bench.txt | tee benchstat.txt

felixge

diff --git a/src/runtime/pprof/pprof_test.go b/src/runtime/pprof/pprof_test.go
index 1947edf44a..f474036ccf 100644
--- a/src/runtime/pprof/pprof_test.go
+++ b/src/runtime/pprof/pprof_test.go
@@ -1435,49 +1435,25 @@ func TestLabelSystemstack(t *testing.T) {
        // Two conditions to check:
        // * labelHog should always be labeled.
        // * The label should _only_ appear on labelHog and the Do call above.
-       for _, s := range p.Sample {
+       _true, _false := true, false

felixge

{"version":0,"package":"main","goos":"darwin","goarch":"amd64","gc_version":"go1.17.2","file":"/Users/felix.geisendoerfer/go/src/github.com/felixge/dump/inline-test/main.go"}
{"range":{"start":{"line":5,"character":6},"end":{"line":5,"character":6}},"severity":3,"code":"canInlineFunction","source":"go compiler","message":"cost: 59"}
{"range":{"start":{"line":9,"character":6},"end":{"line":9,"character":6}},"severity":3,"code":"cannotInlineFunction","source":"go compiler","message":"function too complex: cost 88 exceeds budget 80"}
{"range":{"start":{"line":11,"character":15},"end":{"line":11,"character":15}},"severity":3,"code":"escape","source":"go compiler","message":"\"Hello World\" escapes to heap","relatedInformation":[{"location":{"uri":"file:///Users/felix.geisendoerfer/go/src/github.com/felixge/dump/inline-test/main.go","range":{"start":{"line":11,"character":15},"end":{"line":11,"character":15}}},"message":"escflow:    flow: ~arg0 = \u0026{storage for \"Hello World\"}:"},{"location":{"uri":"file:///U

felixge

{
  "flameExplain": "Go to flame-explain.com and paste this JSON in the Input tab.",
  "input": {
    "plan": "[\n  {\n    \"Plan\": {\n      \"Node Type\": \"Function Scan\",\n      \"Parallel Aware\": false,\n      \"Function Name\": \"generate_series\",\n      \"Schema\": \"pg_catalog\",\n      \"Alias\": \"generate_series\",\n      \"Startup Cost\": 0.00,\n      \"Total Cost\": 10.00,\n      \"Plan Rows\": 1000,\n      \"Plan Width\": 4,\n      \"Actual Startup Time\": 194.503,\n      \"Actual Total Time\": 331.185,\n      \"Actual Rows\": 1500000,\n      \"Actual Loops\": 1,\n      \"Output\": [\"generate_series\"],\n      \"Function Call\": \"generate_series(1, 1500000)\",\n      \"Shared Hit Blocks\": 0,\n      \"Shared Read Blocks\": 0,\n      \"Shared Dirtied Blocks\": 0,\n      \"Shared Written Blocks\": 0,\n      \"Local Hit Blocks\": 0,\n      \"Local Read Blocks\": 0,\n      \"Local Dirtied Blocks\": 0,\n      \"Local Written Blocks\": 0,\n      \"Temp Read Blocks\": 0,\n      \"Temp Written Bloc

felixge

{
  "flameExplain": "Go to flame-explain.com and paste this JSON in the Input tab.",
  "input": {
    "plan": "[\n  {\n    \"Plan\": {\n      \"Node Type\": \"Function Scan\",\n      \"Parallel Aware\": false,\n      \"Function Name\": \"generate_series\",\n      \"Schema\": \"pg_catalog\",\n      \"Alias\": \"generate_series\",\n      \"Startup Cost\": 0.00,\n      \"Total Cost\": 10.00,\n      \"Plan Rows\": 1000,\n      \"Plan Width\": 4,\n      \"Actual Startup Time\": 194.503,\n      \"Actual Total Time\": 331.185,\n      \"Actual Rows\": 1500000,\n      \"Actual Loops\": 1,\n      \"Output\": [\"generate_series\"],\n      \"Function Call\": \"generate_series(1, 1500000)\",\n      \"Shared Hit Blocks\": 0,\n      \"Shared Read Blocks\": 0,\n      \"Shared Dirtied Blocks\": 0,\n      \"Shared Written Blocks\": 0,\n      \"Local Hit Blocks\": 0,\n      \"Local Read Blocks\": 0,\n      \"Local Dirtied Blocks\": 0,\n      \"Local Written Blocks\": 0,\n      \"Temp Read Blocks\": 0,\n      \"Temp Written Bloc

felixge

// Example program showing that signal delivery from setitimer ends up in
// "random" threads of the executing program.

#include <sys/time.h>
#include <unistd.h>
#include <signal.h>
#include <pthread.h>
#include <stdio.h>
#include <stdlib.h>

felixge

// Package multiwrap implements support for wrapping multiple errors into a
// single error value that supports the Go 1.13 Unwrap(), Is() and As()
// interface. It's similar to go-multierror [1].
//
// This is a proof of concept and I'm looking for feedback! Maybe somebody has
// already done a nicer version of this idea?
//
// [1] https://godoc.org/github.com/hashicorp/go-multierror
package multiwrap

felixge

  global  main
  extern  printf

  section .text
main:
  sub     rdi, 1  ; argc includes program name, so substract 1 to get arg count
  cmp     rdi, 1  ; check if we got exactly 1 arg
  jne     bad_arg_count ; if not, jump to bad_arg_count
  mov     r15, [rsi+8] ; main's argv[1]
  mov     r14, 0 ; index (also byte count)

felixge

let last = new Date();
setInterval(function () {
  delta = new Date() - last;
  if (delta > 2) {
    console.log(delta);
  }
  last = new Date();
}, 1);

setInterval(function () {