Description
Summary
I have gotten very long compile time (2 hrs plus) when I tried to compile a code that has a large array inbuilt in the code when I turn optimization on. When the code is compiled without optimization, it has a acceptable compile time (10+ seconds).
The array contains 130,000 + strs.
Details
I tried this code:
$ cargo build
Compiling alliteration-gen v0.1.0 (file:///<REDACTED>)
Finished dev [unoptimized + debuginfo] target(s) in 11.23 secs
$ cargo build --release
Compiling alliteration-gen v0.1.0 (file:///<REDACTED>)
^C
I expected to see this happen: With the non-optimized code running in 11 seconds, the optimized one shouldn't take more than a few minutes.
Instead, this happened: When i waited for it to compile, it took 10039.81 secs (2 hrs 47 mins).
I replicated the problem again on a different Cargo project path and different machines and faced the same issue (didn't fully compile them as it would take very long. I waited for 5 minutes for each machine).
Environment
Machines tested:
- Ubuntu 16.04 (Dell XPS 9360 Intel i5-7200U; 8GB RAM)
- Kali Linux 2018.01 (Old Laptop with i5)
- Windows 10 with msvc (Desktop Intel i5 4570 3.2GHz; 8GB RAM)
Cargo project files attached.
nolib.zip
Meta
rustc --version --verbose:
rustc 1.22.1
binary: rustc
commit-hash: unknown
commit-date: unknown
host: x86_64-unknown-linux-gnu
release: 1.22.1
LLVM version: 4.0
rustc 1.24.1
binary: rustc
commit-hash: unknown
commit-date: unknown
host: x86_64-unknown-linux-gnu
release: 1.24.1
LLVM version: 4.0
rustc 1.24.1 (d3ae9a9 2018-02-27)
binary: rustc
commit-hash: d3ae9a9
commit-date: 2018-02-27
host: x86_64-pc-windows-msvc
release: 1.24.1
LLVM version: 4.0