Strategies to speed up build iteration, or dynamic hot reloading
summary
Practical checklist of what actually speeds Rust iteration: swap the linker to LLD or experimental mold/wild, try Cranelift for faster codegen, add sccache or a shared target dir to reuse artifacts, and measure with hyperfine, cargo build --timings and cargo-llvm-lines. Replace heavy build scripts/proc-macros or pre-generate checked data, prefer dynamic dispatch or feature-gated code to avoid monomorphization blowups, run cargo-next-test and bacon file watchers for instant loops, and explore hot-reload via libloading/Subsecond or safe WASM plugins; a simple strings cleanup once gave ~5% speedup.
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chapters (31)
- 0:00Rust build iteration speed
- 1:12Rust compilation slowness
- 3:39Measuring Rust build performance
- 5:44Rust compiler improvements
- 6:06Cargo profiles for faster builds
- 7:10Faster Rust toolchain components
- 8:12Incremental compilation in Rust
- 9:57Shared compilation caches with sccache
- 11:00Debugging Rust rebuilds
- 11:44rust-analyzer parallel builds
- 12:05Bazel for Rust builds
- 12:48CI pipelines for Rust
- 13:52OS optimizations for Rust builds
- 14:34Speeding up tests and integration tests
- 15:57Reducing example rebuilds
- 16:38Workspace parallel compilation
- 17:18Dynamic linking in Rust
- 18:21Automated builds with watchers
- 19:04Cleaning Rust dependencies
- 20:05Features to reduce compilation
- 22:08Macros impact on compile time
- 23:53Procedural macros side effects
- 24:35Faster build scripts
- 25:37Static vs dynamic dispatch
- 27:21Reducing generics overhead
- 28:24Moving logic outside Rust
- 30:09Hot reloading Rust with dynamic libs
- 31:31Hot reloading with WASM
- 32:36Subsecond hot patching
- 34:03Trade-offs for build speed
- 36:09Q&A
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