Stackdriver command line viewer(helper) ///

YooWaan — Sat, 16 May 2020 17:08:28 +0000

I'm boring using stackdriver logging console.

I wanna just only terminal.

So I created for appengine. done.

🛢command example

# error severity
$ gaelog -e
# http status >= 400
$ gaelog -r
# with query
$ gaelog -e "log like '%POST%'"

🎞Terminal Play

🧸 My Gist

Gist Link

Golang atomic.AddInt64 not fast ////

YooWaan — Sun, 19 Jan 2020 08:29:43 +0000

I benchmarked golang simple countup of not fixed code, mutex, atomic.AddInt64 or atomic.Value on goroutine.

Result

fastest result: atomic.Value > mutex > not fixed code > atomic.AddInt64

One time result

$ go test -bench .
goos: linux
goarch: amd64
BenchmarkInc_Countup-4               2000000           957 ns/op
--- BENCH: BenchmarkInc_Countup-4
    acounter_test.go:13: 1 -> 1
    acounter_test.go:13: 100 -> 100
    acounter_test.go:13: 10000 -> 9752
    acounter_test.go:13: 1000000 -> 982973
    acounter_test.go:13: 2000000 -> 1962072
BenchmarkLock_Countup-4              2000000           936 ns/op
--- BENCH: BenchmarkLock_Countup-4
    acounter_test.go:20: 1 -> 1
    acounter_test.go:20: 100 -> 100
    acounter_test.go:20: 10000 -> 10000
    acounter_test.go:20: 1000000 -> 1000000
    acounter_test.go:20: 2000000 -> 2000000
BenchmarkAtomic_Countup-4            2000000           943 ns/op
--- BENCH: BenchmarkAtomic_Countup-4
    acounter_test.go:27: 1 -> 1
    acounter_test.go:27: 100 -> 100
    acounter_test.go:27: 10000 -> 10000
    acounter_test.go:27: 1000000 -> 1000000
    acounter_test.go:27: 2000000 -> 2000000
BenchmarkAtomicValue_Countup-4       2000000           904 ns/op
--- BENCH: BenchmarkAtomicValue_Countup-4
    acounter_test.go:36: 1 -> 1
    acounter_test.go:36: 100 -> 54
    acounter_test.go:36: 10000 -> 7125
    acounter_test.go:36: 1000000 -> 791697
    acounter_test.go:36: 2000000 -> 1586774
PASS

Three times result

$ for i in $(seq 1 3); do go test -bench . | grep 'ns/op'; done
BenchmarkInc_Countup-4               2000000           998 ns/op
BenchmarkLock_Countup-4              2000000           986 ns/op
BenchmarkAtomic_Countup-4            2000000          1130 ns/op
BenchmarkAtomicValue_Countup-4       2000000           987 ns/op
BenchmarkInc_Countup-4               2000000           989 ns/op
BenchmarkLock_Countup-4              1000000          1113 ns/op
BenchmarkAtomic_Countup-4            1000000          1010 ns/op
BenchmarkAtomicValue_Countup-4       2000000          1013 ns/op
BenchmarkInc_Countup-4               1000000          1018 ns/op
BenchmarkLock_Countup-4              1000000          1311 ns/op
BenchmarkAtomic_Countup-4            1000000          1051 ns/op
BenchmarkAtomicValue_Countup-4       1000000          1125 ns/op

DEV Community: YooWaan