FLAME
A cool flamegraph library for rust
Flamegraphs are a great way to view profiling information. At a glance, they give you information about how much time your program spends in critical sections of your code giving you some much-needed insight into where optimizations may be needed.
Unlike tools like perf
which have the OS interrupt your running
program repeatadly and reports on every function in your callstack,
FLAME lets you choose what you want to see in the graph by adding
performance instrumentation to your own code.
Simply use any of FLAMEs APIs to annotate the start and end of a block code that you want timing information from, and FLAME will organize these timings hierarchically.
Docs
Here's an example of how to use some of FLAMEs APIs:
extern crate flame;
use File;
And here's a screenshot of a flamegraph produced by dump_html
(from a different project):
llogiq has created flamer, a compiler plugin that automatically inserts FLAME instrumentation into annotated functions allowing you to write code like
So if you are using a nightly version of rust, check it out; flamer is probably the easiest way to use FLAME!