https://github.com/rust-lang/rust http://git.dreamy.place/mirrors/rust/atom?h=try-perf 2025-08-09T07:47:01+00:00 2025-08-09T07:47:01+00:00 Deadbeef ent3rm4n@gmail.com 2025-08-09T05:24:06+00:00 urn:sha1:ad1113f87ef828b300ebb8fca397efd358580da3 2025-06-23T22:42:14+00:00 Nicholas Nethercote n.nethercote@gmail.com 2025-06-23T22:42:14+00:00 urn:sha1:c3200c3bb54b94bafb0731adeffd2128f1d6cdd3 It currently reports net size, i.e. size(output) - size(input). After some use I think this is sub-optimal, and it's better to just report size(output). Because for derive macros the input size is always 1, and for attribute macros it's almost always 1. 2025-06-12T11:17:17+00:00 Nicholas Nethercote n.nethercote@gmail.com 2025-06-02T09:39:38+00:00 urn:sha1:376cbc3787d2312b6b3b5db84dd1734fed1ebda6 It collects data about macro expansions and prints them in a table after expansion finishes. It's very useful for detecting macro bloat, especially for proc macros. Details: - It measures code snippets by pretty-printing them and then measuring lines and bytes. This required a bunch of additional pretty-printing plumbing, in `rustc_ast_pretty` and `rustc_expand`. - The measurement is done in `MacroExpander::expand_invoc`. - The measurements are stored in `ExtCtxt::macro_stats`.