diff options
Diffstat (limited to 'content/posts/001.md')
| -rw-r--r-- | content/posts/001.md | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/content/posts/001.md b/content/posts/001.md new file mode 100644 index 0000000..48ea720 --- /dev/null +++ b/content/posts/001.md @@ -0,0 +1,36 @@ +--- +title: "Go Benchmarking" +tags: posts +--- +1. write a benchmark +2. run a benchmark +3. get a profile +4. optimise +5. run your tests +6. goto 2. + +## cpuprofile +`go test -test=XXX -bench <regex> -cpuprofile <file>` + +## memprofile +`go test -test=XXX -bench <regex> -memprofile <file> -benchmem` + +## pprof +[pprof usage](https://github.com/google/pprof/blob/main/doc/README.md) + +`go pprof -http=:8080 profile.pb.gz` +will show a web UI for analysing the profile. + +### views: +- flame graph: `localhost:8080/ui/flamegraph` + - shows percentage breakdown of how much resource each "call" made. + - clicking a box will make it "100%" allowing for deep diving + - right click "show source code" to view +- top: `localhost:8080/ui/top` + - shows top functions + - `flat`: profile samples in this function + - `cum`: (cumulative) profile samples in this function and its callees +- source: `localhost:8080/ui/source` + - each source line is annotated with the time spent in that source line + - the first number does not count time spent in functions called from the source line + - the second number does
\ No newline at end of file |