From 786598bbf67bc33a6d1fe4093e6fd5a992d8fc23 Mon Sep 17 00:00:00 2001
From: konsti <konstin@mailbox.org>
Date: Mon, 25 Mar 2024 21:57:26 +0100
Subject: [PATCH] Add fast build profile without debuginfo (#2628)
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Add a compile option `-p fast-build` for a 16% incremental compile
speedup (linux) at the cost of having no debuginfo.

After trying various rust compiler speedup suggestions, setting mold as
my default linker and removing debuginfo are the only ones showing a
speedup.

```
hyperfine --warmup 1 --runs 3 --prepare "touch crates/uv-resolver/src/resolver/mod.rs" \
    "cargo +nightly build --bin uv" \
    "cargo +nightly build --bin uv --profile fast-build"
Benchmark 1: cargo +nightly build --bin uv
  Time (mean ± σ):      1.569 s ±  0.008 s    [User: 1.179 s, System: 0.369 s]
  Range (min … max):    1.560 s …  1.576 s    3 runs

Benchmark 2: cargo +nightly build --bin uv --profile fast-build
  Time (mean ± σ):      1.353 s ±  0.020 s    [User: 1.109 s, System: 0.301 s]
  Range (min … max):    1.338 s …  1.375 s    3 runs

Summary
  cargo +nightly build --bin uv --profile fast-build ran
    1.16 ± 0.02 times faster than cargo +nightly build --bin uv
```
---
 Cargo.toml | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/Cargo.toml b/Cargo.toml
index b7300a981..a0a33ff9c 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -186,6 +186,11 @@ rest_pat_in_fully_bound_structs = "warn"
 inherits = "release"
 debug = true
 
+[profile.fast-build]
+inherits = "dev"
+debug = 0
+strip = "debuginfo"
+
 # The profile that 'cargo dist' will build with.
 [profile.dist]
 inherits = "release"