Tracing Our Tool

Overview

The Go profiler is a great tool to help you understand how your program is spending CPU time. However, sometimes a program is spending time waiting for resources to be available. For example, it could be spending time waiting for a network connection or a file to be read. To help you understand those cases, Go provides another tool: the tracer.

Similar to the profiler, the tracer is also integrated with the testing and benchmarking features through the go test tool. Run the benchmarks again with the -trace option to create a trace:

goos: linux
goarch: amd64
pkg: usercode/performance/colStats
Benchmark_Run-4 10 685356800 ns/op
PASS
ok usercode/performance/colStats 7.712s

Once the trace is created, view the results with the go tool trace command: ...