[lldb-dev] LLDB nightly benchmarks and flamegraphs

Zachary Turner via lldb-dev lldb-dev at lists.llvm.org
Fri Aug 3 15:59:05 PDT 2018

This is really cool.  Maybe you could do it for all of LLVM too?  It would
be nice if, instead of cycling through each benchmark on a set interval,
there were just a dropdown box where you could select the one you wanted to

On Fri, Aug 3, 2018 at 3:37 PM Raphael Isemann via lldb-dev <
lldb-dev at lists.llvm.org> wrote:

> Hi everyone,
> I wanted to share a (hopefully useful) service for LLDB that I added
> recently:
> If you go to https://teemperor.de/lldb-bench/ you'll now see graphs
> that show the instruction count and memory usage of the last LLDB
> nightlies (one per day). If you click on a graph you'll see a flame
> graph that shows how much time we spent in each function when running
> the benchmark. The graph should make it pretty obvious where the good
> places for optimizations are.
> You can see all graphs without the slide show under
> https://teemperor.de/lldb-bench/static.html.
> The source code of every benchmark can be found here:
> https://github.com/Teemperor/lldb-bench If you want to add a
> benchmark, just make a PR to that repository and I'll merge it. See
> the README of the repo for instructions.
> I'll add more benchmarks in the future, but you are welcome to add your
> own.
> Also, if you for some reason don't appreciate my amazing GNUplot
> markup skills and prefer your own graphs, you can just grab the raw
> benchmark data from here: https://teemperor.de/lldb-bench/data/ The
> data format is just the time, git-commit and the
> instruction-count/memoryInKB value (depending if it's a `.mem.dat` or
> a `.inst.dat`).
> On a side note: Today's spike in memory is related to changes in the
> build setup, not a LLDB change. I don't expect too many of these
> spikes to happen in the future because the benchmark framework is now
> hopefully stable enough.
> Cheers,
> - Raphael
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> lldb-dev at lists.llvm.org
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