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authorbors <bors@rust-lang.org>2018-07-29 09:33:37 +0000
committerbors <bors@rust-lang.org>2018-07-29 09:33:37 +0000
commit023fd7e74a9eb5bafcb75fcbe69b7110e9de4492 (patch)
treec9b50228b27509d45f6d73e33aaec6b482c80c36 /src/libsyntax/parse/parser.rs
parenta5c2d0fffaaf0b764c01bc4066e51ffd475ceae9 (diff)
parent57a5a9b05423c4f832cd9a3aaa7e06d55fab6efa (diff)
downloadrust-023fd7e74a9eb5bafcb75fcbe69b7110e9de4492.tar.gz
rust-023fd7e74a9eb5bafcb75fcbe69b7110e9de4492.zip
Auto merge of #52767 - ljedrz:avoid_format, r=petrochenkov
Prefer to_string() to format!()

Simple benchmarks suggest in some cases it can be faster by even 37%:
```
test converting_f64_long  ... bench:         339 ns/iter (+/- 199)
test converting_f64_short ... bench:         136 ns/iter (+/- 34)
test converting_i32_long  ... bench:          87 ns/iter (+/- 16)
test converting_i32_short ... bench:          87 ns/iter (+/- 49)
test converting_str       ... bench:          54 ns/iter (+/- 15)
test formatting_f64_long  ... bench:         349 ns/iter (+/- 176)
test formatting_f64_short ... bench:         145 ns/iter (+/- 14)
test formatting_i32_long  ... bench:          98 ns/iter (+/- 14)
test formatting_i32_short ... bench:          93 ns/iter (+/- 15)
test formatting_str       ... bench:          86 ns/iter (+/- 23)
```
Diffstat (limited to 'src/libsyntax/parse/parser.rs')
-rw-r--r--src/libsyntax/parse/parser.rs2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/libsyntax/parse/parser.rs b/src/libsyntax/parse/parser.rs
index 56760546c50..9011b6e48b9 100644
--- a/src/libsyntax/parse/parser.rs
+++ b/src/libsyntax/parse/parser.rs
@@ -6320,7 +6320,7 @@ impl<'a> Parser<'a> {
                 mod_name: mod_name.clone(),
                 default_path: default_path_str,
                 secondary_path: secondary_path_str,
-                dir_path: format!("{}", dir_path.display()),
+                dir_path: dir_path.display().to_string(),
             }),
             (true, true) => Err(Error::DuplicatePaths {
                 mod_name: mod_name.clone(),