Optimize goto binary exporting in cprover_bindings
#4148
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tautschnig
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Auto generated release notes: ## What's Changed * Edit quantifiers' documentation. by @thanhnguyen-aws in #4142 * Fix the bug of using multiple hidden variables for the prev of the same Expr by @thanhnguyen-aws in #4150 * Remove `assess` subcommand by @carolynzech in #4111 * Optimize goto binary exporting in `cprover_bindings` by @AlexanderPortland in #4148 * Add the option to generate performance flamegraphs by @AlexanderPortland in #4138 * Fix the bug: Static union values can panic Kani by @thanhnguyen-aws in #4112 * Update toolchain to 2025-06-13 by @carolynzech in #4152 * Automatic cargo update to 2025-06-16 by @github-actions in #4156 * Major-version update cargo dependencies by @tautschnig in #4158 * Upgrade Rust toolchain to 2025-06-16 by @tautschnig in #4157 * Bump tests/perf/s2n-quic from `3129ad5` to `c6e694e` by @dependabot in #4160 * Bump tests/perf/s2n-quic from `c6e694e` to `b1b5bf8` by @dependabot in #4164 * Upgrade Rust toolchain to 2025-06-17 by @tautschnig in #4163 * Automatic cargo update to 2025-06-23 by @github-actions in #4172 * Stub panics during MIR transformation by @AlexanderPortland in #4169 * Bump tests/perf/s2n-quic from `b1b5bf8` to `32ba87d` by @dependabot in #4175 * Handle enums with zero or one variants by @zhassan-aws in #4171 * Introduce compiler timing script & CI job by @AlexanderPortland in #4154 * Upgrade Rust toolchain to 2025-06-18 by @tautschnig in #4166 * Cache dependencies for CI jobs by @AlexanderPortland in #4181 * Autoharness: Derive `Arbitrary` for structs and enums by @carolynzech in #4167 * Upgrade Rust toolchain to 2025-06-27 by @tautschnig in #4182 * Include wget in dependencies by @zhassan-aws in #4183 * Automatic cargo update to 2025-06-30 by @github-actions in #4186 * Add support for loop assigns in loop contracts by @thanhnguyen-aws in #4174 * Upgrade toolchain to 06/30 by @carolynzech in #4188 * Optimize reachability with non-mutating global passes by @AlexanderPortland in #4177 * Bump tests/perf/s2n-quic from `32ba87d` to `b8f8cca` by @dependabot in #4190 * Bump ncipollo/release-action from 1.16.0 to 1.18.0 by @dependabot in #4191 * Upgrade toolchain to 07/02 by @carolynzech in #4195 * Automatic Derivation Fixes by @carolynzech in #4194 **Full Changelog**: kani-0.63.0...kani-0.64.0 By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 and MIT licenses.
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Motivated by the finding that the
write_goto_binary_filefunction is responsible for around half of our compiler's codegen time, this PR does a collection of low-hanging fruit optimizations for the way we export goto files in thecprover_bindingscrate.This includes:
IrepNumberingcaches to use the fasterFxHashMap(as used in the rust compiler).entry().or_insert()to initialize the irep cache.get()and.insert()(as the compiler seemed to have not optimized them together)IrepIdstrings copy-on-writeInternedStrings directly from borrowed string literals when possibleInitial testing (on
perf/format&perf/vec/vec) suggests that these changes make our compiler ~13% faster, but I'm also working on comparing performance on the whole std project for the future.By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 and MIT licenses.