From 508527f52de524a4fd174d386808e314b4138b11 Mon Sep 17 00:00:00 2001 From: alex emery Date: Sun, 3 Nov 2024 15:33:28 +0000 Subject: feat: static builds --- public/posts/2024-08-25-01.html | 117 ++++++++++++++++++++++++++++++++++++++++ 1 file changed, 117 insertions(+) create mode 100644 public/posts/2024-08-25-01.html (limited to 'public/posts/2024-08-25-01.html') diff --git a/public/posts/2024-08-25-01.html b/public/posts/2024-08-25-01.html new file mode 100644 index 0000000..4bd4371 --- /dev/null +++ b/public/posts/2024-08-25-01.html @@ -0,0 +1,117 @@ + + + + + + + + + + a73x + + + + + +

a73x

+ _{high effort, low reward} + + +

Go Benchmarking

+ +

The benchmark cycle:

+ +

write a benchmark
run a benchmark
get a profile
optimise
run your tests
goto 2.

+ +

cpuprofile

go test -test=XXX -bench <regex> -cpuprofile <file>
+

memprofile

go test -test=XXX -bench <regex> -memprofile <file> -benchmem
+

pprof

+ +

pprof usage

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

+ + + + + + + -- cgit v1.2.3