rustc --version --verbose
rustc 1.20.0-nightly (622e7e648 2017-06-21)
binary: rustc
commit-hash: 622e7e6487b6fb7fdbb901720cd4214f9179ed67
commit-date: 2017-06-21
host: x86_64-unknown-linux-gnu
release: 1.20.0-nightly
LLVM version: 4.0
CARGO_INCREMENTAL=1 cargo build --release
Finished release [optimized] target(s) in 471.63 sec
rustc --version --verbose
rustc 1.18.0-nightly (bbdaad0dc 2017-04-14)
binary: rustc
commit-hash: bbdaad0dc8dc64e036ccee817f90a91876b32a9d
commit-date: 2017-04-14
host: x86_64-unknown-linux-gnu
release: 1.18.0-nightly
LLVM version: 3.9
CARGO_INCREMENTAL=1 cargo build --release
Finished release [optimized] target(s) in 85.78 secs