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update README, remove buildifier

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Motiejus Jakštys
2022-11-21 06:25:58 +02:00
parent 13e9363cd8
commit 2dc25f0e3e
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@@ -7,43 +7,28 @@ reproduces that.
Steps to reproduce
------------------
llvm14: 10-11 seconds to compile 96 binaries on an 8-core machine:
llvm14: 12-13 seconds to compile 64 binaries on an 8-core machine:
```
$ bazel clean; bazel shutdown; bazel build --extra_toolchains=@llvm_toolchain//:cc-toolchain-x86_64-linux ...
INFO: Starting clean (this may take a while). Consider using --async if the clean takes more than several minutes.
Starting local Bazel server and connecting to it...
INFO: Analyzed 96 targets (41 packages loaded, 1458 targets configured).
INFO: Found 96 targets...
INFO: Elapsed time: 10.725s, Critical Path: 0.66s
INFO: 481 processes: 289 internal, 192 linux-sandbox.
INFO: Build completed successfully, 481 total actions
INFO: Analyzed 64 targets (41 packages loaded, 1426 targets configured).
INFO: Found 64 targets...
INFO: Elapsed time: 12.454s, Critical Path: 1.11s
INFO: 321 processes: 193 internal, 128 linux-sandbox.
INFO: Build completed successfully, 321 total actions
```
zig cc: 3.5 minutes. Anecdotally when looking at `htop` looks like it does not
parallelize at all:
zig cc: 2,5 minutes:
```
$ bazel clean; bazel shutdown; bazel build --platforms=@zig_sdk//libc_aware/platform:linux_amd64_gnu.2.28 ...
INFO: Starting clean (this may take a while). Consider using --async if the clean takes more than several minutes.
Starting local Bazel server and connecting to it...
INFO: Analyzed 96 targets (41 packages loaded, 14394 targets configured).
INFO: Found 96 targets...
INFO: Elapsed time: 214.333s, Critical Path: 18.31s
INFO: 385 processes: 193 internal, 192 linux-sandbox.
INFO: Build completed successfully, 385 total actions
```
Move sandbox to `/dev/shm` and reuse the sandboxes: 3 minutes and a bit.
```
$ bazel clean; bazel shutdown; bazel build --sandbox_base=/dev/shm --experimental_reuse_sandbox_directories --platforms=@zig_sdk//libc_aware/platform:linux_amd64_gnu.2.28 ...
INFO: Starting clean (this may take a while). Consider using --async if the clean takes more than several minutes.
Starting local Bazel server and connecting to it...
INFO: Analyzed 96 targets (41 packages loaded, 14394 targets configured).
INFO: Found 96 targets...
INFO: Elapsed time: 194.643s, Critical Path: 25.35s
INFO: 385 processes: 193 internal, 192 linux-sandbox.
INFO: Build completed successfully, 385 total actions
motiejus@motiejus-20NYS8QG0B:/code/test-zigcc$
INFO: Analyzed 64 targets (41 packages loaded, 14450 targets configured).
INFO: Found 64 targets...
INFO: Elapsed time: 142.264s, Critical Path: 20.65s
INFO: 257 processes: 129 internal, 128 linux-sandbox.
INFO: Build completed successfully, 257 total actions
```