Hamish Knight f728466273 [SwiftCompilerSources] Use interpolation instead of String(describing:) ...

`String(describing:)` does a bunch of dynamic casts
that can be pretty slow. Use interpolation instead,
which bypasses them.

For `swift-frontend`, this brings the time taken
for type-checking an empty file down from ~100ms
to ~70ms.

For `swift build`, this brings the time taken for
a null build down from ~600ms to ~450ms (the
larger delta is presumably due to the fact that
there's much more Swift code in `swift-package`).

2024-12-19 15:33:39 +00:00

1.9 KiB

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