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### What Uses the latest egui containing this gem: * emilk/egui#5059 So far `request_discard` (running a second pass) is only used in these situations: * For when a `Grid` first shows up * When an egui_table first shows up * When asked to auto-size an `egui_table` row Of course, running a second pass has some costs. Luckily, we already execute our most expensive stuff (the viewport) last, and so we can easily early-out from things like point cloud upload/rendering, as shown in this puffin-capture of a frame with two passes in it: ![image](https://github.com/user-attachments/assets/8fecdc38-191e-4396-afaf-61abaa06437d) NOTE: this flamegraph is of a DEBUG build - the point is not the relative times, but that `pass 0` becomes very cheap, if the `request_discard` is called from one of the non-viewport panels (e.g. the selection panel). There might still be cases where we do expensive stuff twice, e.g. if something calls `request_discard` in a space view tooltip. If we come to regret this, we can disable all second passes by setting `egui::Options::max_passes` to `1`. ### Checklist * [x] I have read and agree to [Contributor Guide](https://github.com/rerun-io/rerun/blob/main/CONTRIBUTING.md) and the [Code of Conduct](https://github.com/rerun-io/rerun/blob/main/CODE_OF_CONDUCT.md) * [x] I've included a screenshot or gif (if applicable) * [x] I have tested the web demo (if applicable): * Using examples from latest `main` build: [rerun.io/viewer](https://rerun.io/viewer/pr/7418?manifest_url=https://app.rerun.io/version/main/examples_manifest.json) * Using full set of examples from `nightly` build: [rerun.io/viewer](https://rerun.io/viewer/pr/7418?manifest_url=https://app.rerun.io/version/nightly/examples_manifest.json) * [x] The PR title and labels are set such as to maximize their usefulness for the next release's CHANGELOG * [x] If applicable, add a new check to the [release checklist](https://github.com/rerun-io/rerun/blob/main/tests/python/release_checklist)! * [x] If have noted any breaking changes to the log API in `CHANGELOG.md` and the migration guide - [PR Build Summary](https://build.rerun.io/pr/7418) - [Recent benchmark results](https://build.rerun.io/graphs/crates.html) - [Wasm size tracking](https://build.rerun.io/graphs/sizes.html) To run all checks from `main`, comment on the PR with `@rerun-bot full-check`.
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