This is a creation in Article, where the information may have evolved or changed. First, official documents
Https://blog.golang.org/profiling-go-programs
$CD Your_programe_dir
$go Build
$./your_programe-cpuprofile=xxx.prof
$go tool pprof./your_programe xxx.prof
Entering interactive mode (type ' help ' for commands)
(pprof) Top 10
...
(pprof) Web generates an SVG file and opens
Note: Mac is opened by default with sublime and needs to be modified to chrome:http://blog.csdn.net/jiaolongdy/article/details/50945684
1. If a prompt appears:
Cannot find dot, are you installed Graphviz?
Need to install Graphviz with root user
$sudo Brew Install Graphviz
2. If a prompt appears:
Profile is empty
That's because the default pprof sampling frequency is 100 times per second, which can happen if your program runs too fast and ends before the first sample.
Either add a For loop or sleep in the program, or adjust the sampling frequency (see two)
Two
At first, someone wrote a package that could be customized profiing:
Https://github.com/davecheney/profile
However, it was later updated with the following specific reasons:
http://dave.cheney.net/2014/10/22/simple-profiling-package-moved-updated
Because some projects already use the old API, the author gives a new package directly:
Https://github.com/pkg/profile
