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This helped me benchmark the atomic layout (#5830) changes. I also realized that the label benchmark wasn't testing the painting, since the buttons at some point will be placed outside the screen_rect, meaning it won't be painted. This fixes it by benching the label in a child ui. The `label &str` benchmark went from 483 ns to 535 ns with these changes. EDIT: I fixed another benchmark problem, since the benchmark would show the same widget millions of times for a single frame, the WidgetRects hashmap would get huge, causing each iteration to slow down a bit more and causing the benchmark to have unreliable results. With this the `label &str` benchmark went from 535ns to 298ns. Also the `label format!` benchmark now takes almost the same time (302 ns). Before, it was a lot slower since it reused the same Context which already had millions of widget ids.
33 lines
1.4 KiB
Markdown
33 lines
1.4 KiB
Markdown
# [`egui`](https://github.com/emilk/egui) demo library
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[](https://crates.io/crates/egui_demo_lib)
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[](https://docs.rs/egui_demo_lib)
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[](https://github.com/rust-secure-code/safety-dance/)
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This crate contains example code for [`egui`](https://github.com/emilk/egui).
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The demo library is a separate crate for three reasons:
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* To ensure it only uses the public `egui` api.
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* To remove the amount of code in `egui` proper.
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* To make it easy for 3rd party egui integrations to use it for tests.
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- See for instance https://github.com/not-fl3/egui-miniquad/blob/master/examples/demo.rs
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This crate also contains benchmarks for egui.
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Run them with
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```bash
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# Run all benchmarks
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cargo bench -p egui_demo_lib
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# Run a single benchmark
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cargo bench -p egui_demo_lib "benchmark name"
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# Profile benchmarks with cargo-flamegraph (--root flag is necessary for MacOS)
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CARGO_PROFILE_BENCH_DEBUG=true cargo flamegraph --bench benchmark --root -p egui_demo_lib -- --bench "benchmark name"
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# Profile with cargo-instruments
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CARGO_PROFILE_BENCH_DEBUG=true cargo instruments --profile bench --bench benchmark -p egui_demo_lib -t time -- --bench "benchmark name"
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```
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