Description | Command |
---|---|
Start a new session with session name | screen -S <session_name> |
List running sessions / screens | screen -ls |
Attach to a running session | screen -x |
Attach to a running session with name | screen -r |
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go test -run=. -bench=. -benchtime=5s -count 5 -benchmem -cpuprofile=cpu.out -memprofile=mem.out -trace=trace.out ./package | tee bench.txt | |
go tool pprof -http :8080 cpu.out | |
go tool pprof -http :8081 mem.out | |
go tool trace trace.out | |
go tool pprof $FILENAME.test cpu.out | |
# (pprof) list <func name> | |
# go get -u golang.org/x/perf/cmd/benchstat | |
benchstat bench.txt |
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/* | |
Parallel processing with ordered output in Go | |
(you can use this pattern by importing https://github.com/MarianoGappa/parseq) | |
This example implementation is useful when the following 3 conditions are true: | |
1) the rate of input is higher than the rate of output on the system (i.e. it queues up) | |
2) the processing of input can be parallelised, and overall throughput increases by doing so | |
3) the order of output of the system needs to respect order of input | |
- if 1 is false, KISS! |
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package main | |
import ( | |
"fmt" | |
"math" | |
"time" | |
) | |
// humanizeDuration humanizes time.Duration output to a meaningful value, | |
// golang's default ``time.Duration`` output is badly formatted and unreadable. |
Most of programs will not accept an email using just @localhost as domain.
So, edit /etc/hosts
file to make the domain localhost.com point to your machine, including this content to the file:
127.0.0.1 localhost.com
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