cargo: add release-lto profile

The idea is to build ripgrep with as much optimization as possible.

This makes compilation times absolutely obscene. They jump from <10
seconds to 30+ seconds on my i9-12900K. I don't even want to know how
long CI would take with these.

I tried some ad hoc benchmarks and could not notice any meaningful
improvement with the LTO binary versus the normal release profile.
Because of that, I still don't think it's worth bloating the release
cycle times.

Ref #1225

1 files changed, 12 insertions, 0 deletions

diff --git a/Cargo.toml b/Cargo.toml
index d95858ee..19cbb27f 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -74,6 +74,18 @@ pcre2 = ["grep/pcre2"]
 [profile.release]
 debug = 1
 
+[profile.release-lto]
+inherits = "release"
+opt-level = 3
+debug = "none"
+strip = "symbols"
+debug-assertions = false
+overflow-checks = false
+lto = "fat"
+panic = "abort"
+incremental = false
+codegen-units = 1
+
 # This is the main way to strip binaries in the deb package created by
 # 'cargo deb'. For other release binaries, we (currently) call 'strip'
 # explicitly in the release process.