Merge pull request #392 from pythonspeed/390-workaround

Workaround for slow flamegraph rendering
pythonspeed · Jul 22, 2022 · ea078ac · ea078ac
2 parents 6431d27 + 4bbbc1d
commit ea078ac
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diff --git a/.changelog/390.bugfix b/.changelog/390.bugfix
@@ -0,0 +1 @@
+Speed up rendering of flamegraphs in cases where there are many smaller allocations, by filtering out allocations smaller than 0.2% of total memory. Future releases may re-enable showing smaller allocations if a better fix can be found.
diff --git a/memapi/src/flamegraph.rs b/memapi/src/flamegraph.rs
@@ -135,6 +135,7 @@ pub fn get_flamegraph<I: IntoIterator<Item = String>>(
     options.reverse_stack_order = reversed;
     options.color_diffusion = true;
     options.direction = flamegraph::Direction::Inverted;
+    options.min_width = 0.2;
     // Maybe disable this some day; but for now it makes debugging much
     // easier:
     options.pretty_xml = true;
Original file line number	Diff line number	Diff line change
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		Speed up rendering of flamegraphs in cases where there are many smaller allocations, by filtering out allocations smaller than 0.2% of total memory. Future releases may re-enable showing smaller allocations if a better fix can be found.