How to profile Swift benchmarks in Instruments

Development Compiler
,
1

I was asked this question via DMs and thought the answer might be useful for more people:

When profiling individual benchmarks I'll do the following:

  1. Open Instruments,
  2. Choose Time Profiler template,
  3. Choose Target , navigate to Benchmark_O binary
    (mine is built in /Users/mondo/Developer/swift-source/build/Ninja-Release/swift-macosx-x86_64/bin )
  4. Specify command line Arguments ,
    eg: --num-iters=1 --num-samples=2000 AngryPhonebook
  5. Record Trace
4 Likes
2

@palimondo this seems like something that would be useful to add in a document in the benchmark directory. We should also add something that shows how to do analogous perf measurement on Linux (windows, other platforms, etc).

Your thoughts?

3

It might even make sense to add it to the README since it is such a basic operation.

4

Yeah, there was also your unmerged update to benchmarking documentation floating around somewhere... It'll try to get to updating docs together with RFC: BenchmarkInfo refactoring.