Closed
Description
The binary size of "hello world" program increased in each release:
Detail table
| Rust version | debug | debug - stripped | release | release - stripped |
|---|---|---|---|---|
| 1.32.0 | 2382904 | 199096 | 2375720 | 199016 |
| 1.40.0 | 2595400 | 215464 | 2588264 | 215384 |
| 1.41.0 | 2637336 | 215464 | 2629832 | 215384 |
| 1.42.0 | 2659672 | 211368 | 2652488 | 211288 |
| 1.43.0 | 2729192 | 223584 | 2722128 | 223504 |
| 1.44.0 | 2584120 | 248160 | 2579144 | 248080 |
| 1.45.0 | 2847440 | 244064 | 2842464 | 243984 |
| beta | 2848152 | 244064 | 2843168 | 243984 |
| nightly | 3210208 | 293200 | 3203712 | 293112 |
main.rs
fn main() {
println!("hello world");
}Script to reproduce
rustup set profile minimal
rustup toolchain install 1.{40..45}.0 beta nightly
RUST_DBG_FLAGS='-C debuginfo=1 -C panic=abort -C opt-level=0'
RUST_REL_FLAGS='-C debuginfo=0 -C panic=abort -C opt-level=3'
mkdir -p build/debug
mkdir -p build/release
for ver in 1.{40..45}.0 beta nightly; do
bin_dbg=build/debug/main-$ver
bin_rel=build/release/main-$ver
rustc +$ver $RUST_DBG_FLAGS main.rs -o $bin_dbg
echo "-- $ver"
before=$(stat --printf="%s" $bin_dbg)
strip $bin_dbg
after=$(stat --printf="%s" $bin_dbg)
printf " dbg: %d, stripped: %d\n" $before $after
rustc +$ver $RUST_REL_FLAGS main.rs -o $bin_rel
before=$(stat --printf="%s" $bin_rel)
strip $bin_rel
after=$(stat --printf="%s" $bin_rel)
printf " release: %d, stripped: %d\n" $before $after
done
# rustup toolchain uninstall 1.{40..45}.0 beta nightlyMeta
beta:
rustc 1.46.0-beta.5 (cfbc6d4cf 2020-08-21)
binary: rustc
commit-hash: cfbc6d4cf1acbac5c025acf8ed68929caa551df3
commit-date: 2020-08-21
host: x86_64-unknown-linux-gnu
release: 1.46.0-beta.5
LLVM version: 10.0
nightly:
rustc 1.47.0-nightly (de521cbb3 2020-08-21)
binary: rustc
commit-hash: de521cbb303c08febd9fa3755caccd4f3e491ea3
commit-date: 2020-08-21
host: x86_64-unknown-linux-gnu
release: 1.47.0-nightly
LLVM version: 10.0
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Category: This is a bug.Issue: Problems and improvements with respect to binary size of generated code.Helping to "clean up" bugs with minimal examples and bisectionsMedium priorityRelevant to the compiler team, which will review and decide on the PR/issue.Performance or correctness regression from one stable version to another.