diff options
| -rw-r--r-- | compiler/rustc_metadata/src/locator.rs | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/compiler/rustc_metadata/src/locator.rs b/compiler/rustc_metadata/src/locator.rs index b6922e0d72a..5bd9980566b 100644 --- a/compiler/rustc_metadata/src/locator.rs +++ b/compiler/rustc_metadata/src/locator.rs @@ -740,7 +740,9 @@ fn get_metadata_section( // Header is okay -> inflate the actual metadata let compressed_bytes = &buf[header_len..]; debug!("inflating {} bytes of compressed metadata", compressed_bytes.len()); - let mut inflated = Vec::new(); + // Assume the decompressed data will be at least the size of the compressed data, so we + // don't have to grow the buffer as much. + let mut inflated = Vec::with_capacity(compressed_bytes.len()); match FrameDecoder::new(compressed_bytes).read_to_end(&mut inflated) { Ok(_) => rustc_erase_owner!(OwningRef::new(inflated).map_owner_box()), Err(_) => { |