Making a Go program 42% faster with a one character change • Harry Marr
Update: the title originally stated the optimisation made the program run 70% faster, rather than 42% (with a 1.7x change in speed).
Go comes with a handy interactive profile visualisation tool. I visualised the profile as a flamegraph by running the following command then navigating to the flamegraph view in the menu at the top of the page.
$ go tool pprof -http=":8000" ./codeowners ./cpu.pprof
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