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Hiroaki Nakamura hnakamur

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@hnakamur
hnakamur / main.c
Created May 11, 2020 11:55
try to print time on every second on realtime clock
#include <errno.h>
#include <stdio.h>
#include <string.h>
#include <time.h>
const int sec_in_nsec = 1000000000;
#define ITERMAX 10000
typedef long long nanotime_t;
@hnakamur
hnakamur / bls.cgo2.c
Created March 24, 2020 10:06
output of "go tool cgo -debug-gcc -- -I include bls.go"
#line 1 "cgo-builtin-prolog"
#include <stddef.h> /* for ptrdiff_t and size_t below */
/* Define intgo when compiling with GCC. */
typedef ptrdiff_t intgo;
#define GO_CGO_GOSTRING_TYPEDEF
typedef struct { const char *p; intgo n; } _GoString_;
typedef struct { char *p; intgo n; intgo c; } _GoBytes_;
@hnakamur
hnakamur / README.txt
Last active March 6, 2020 00:25
Diff from github.com/getlantern/systray@6f0e5a3 to github.com/rupor-github/wsl-ssh-agent@a305054
After I read https://github.com/rupor-github/wsl-ssh-agent/tree/a305054739d6ce1fa6261a8b4cb673df083b160e/systray
I was curious about modification made for systray bundled in wsl-ssh-agent and here are diffs.
@hnakamur
hnakamur / swap-myth.txt
Created February 15, 2020 01:52
example Japanese text which is not rendred properly on Windows Terminal
> スワップは遅くて非効率という意味で「悪」と考えられており、システムがスワップを定常的に使う必要があるのであれば、それは明らかに十分なメモリを持っていないということです。 […] > あなたの要求を全て処理するのに十分な RAM があり、それを超えることが絶対起こらないと言え るなら、スワップスペースなしでシステムを稼働することは完全に安全と言えるでしょう。
@hnakamur
hnakamur / console.log
Created January 4, 2020 14:50
Example for passing pre-allocated buf to hash.Sum(b []byte) in Go
$ go test -bench=. -benchmem
goos: linux
goarch: amd64
BenchmarkHashNewSum-2 5807700 205 ns/op 112 B/op 2 allocs/op
BenchmarkHashNewSum2-2 8323488 142 ns/op 0 B/op 0 allocs/op
BenchmarkHashSum-2 8817842 134 ns/op 0 B/op 0 allocs/op
BenchmarkHashSum2-2 7696573 155 ns/op 16 B/op 1 allocs/op
PASS
ok _/home/hnakamur/hash-benchmark 5.402s
$ go version
@hnakamur
hnakamur / Dockerfile
Created November 30, 2019 21:03
OpenResty lua split benchmarkを自分でも試してみた
FROM openresty/openresty:1.15.8.1-3-alpine-fat
ADD nginx.conf /usr/local/openresty/nginx/conf/nginx.conf
@hnakamur
hnakamur / foo_test.go
Created November 25, 2019 20:22
Go test example for comparing JSON results
package foo
import (
"testing"
"github.com/nsf/jsondiff"
)
var jsondiffOpts = jsondiff.DefaultConsoleOptions()
@hnakamur
hnakamur / delete-vm.ps1
Last active September 5, 2021 23:21
Launch Ubuntu bionic VM with Hyper-V
$VMName = "Ubuntu Test"
# Delete the VM if it is around
If ((Get-VM -Name $VMName).Count -gt 0) {stop-vm $VMName -TurnOff -Confirm:$false -Passthru | Remove-VM -Force}
@hnakamur
hnakamur / bench_test.go
Created October 3, 2019 09:01
Go benchmark StringBuilder with Fprintf
package main
import (
"fmt"
"strconv"
"strings"
"testing"
)
func dummy(s string) {}
@hnakamur
hnakamur / main.go
Created September 27, 2019 19:11
go exponential random distribution example
package main
import (
crand "crypto/rand"
"encoding/binary"
"fmt"
"time"
"golang.org/x/exp/rand"
"gonum.org/v1/gonum/stat/distuv"