Fix a regression in 1.30 by reverting #53564#54851
Merged
bors merged 5 commits intorust-lang:masterfrom Oct 6, 2018
Merged
Conversation
Contributor
|
r? @sfackler (rust_highfive has picked a reviewer for you, use r? to override) |
rust-highfive
added
the
S-waiting-on-review
Member
|
@bors r+ |
Collaborator
|
📌 Commit 70ae43f has been approved by |
bors
added
S-waiting-on-bors
alexcrichton
added
beta-nominated
Member
|
@bors p=1 |
emilyalbini
added a commit
to emilyalbini/rust
that referenced
this pull request
Oct 5, 2018
…ckler Fix a regression in 1.30 by reverting rust-lang#53564 Investigation on rust-lang#54477 revealed rust-lang#53564 as the culprit in the regression for that crate. I've reproduced the regression with the [detailed test cases provided](rust-lang#54477 (comment)). While we figure out how to fix the regression this commit reverts the current culprit.
bors
added a commit
that referenced
this pull request
Oct 6, 2018
Rollup of 11 pull requests Successful merges: - #54078 (Expand the documentation for the `std::sync` module) - #54717 (Cleanup rustc/ty part 1) - #54781 (Add examples to `TyKind::FnDef` and `TyKind::FnPtr` docs) - #54787 (Only warn about unused `mut` in user-written code) - #54804 (add suggestion for inverted function parameters) - #54812 (Regression test for #32382.) - #54833 (make `Parser::parse_foreign_item()` return a foreign item or error) - #54834 (rustdoc: overflow:auto doesn't work nicely on small screens) - #54838 (Fix typo in src/libsyntax/parse/parser.rs) - #54851 (Fix a regression in 1.30 by reverting #53564) - #54853 (Remove unneccessary error from test, revealing NLL error.) Failed merges: r? @ghost
Collaborator
emilyalbini
removed
the
beta-nominated
bors
added a commit
to rust-lang-ci/rust
that referenced
this pull request
Oct 15, 2021
Optimize VecDeque::append Optimize `VecDeque::append` to do unsafe copy rather than iterating through each element. On my `Intel(R) Xeon(R) CPU E5-2630 v4 @ 2.20GHz`, the benchmark shows 37% improvements: ``` Master: custom-bench vec_deque_append 583164 ns/iter custom-bench vec_deque_append 550040 ns/iter Patched: custom-bench vec_deque_append 349204 ns/iter custom-bench vec_deque_append 368164 ns/iter ``` Additional notes on the context: this is the third attempt to implement a non-trivial version of `VecDeque::append`, the last two are reverted due to unsoundness or regression, see: - rust-lang#52553, reverted in rust-lang#53571 - rust-lang#53564, reverted in rust-lang#54851 Both cases are covered by existing tests. Signed-off-by: tabokie <xy.tao@outlook.com>
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
5 participants
Add this suggestion to a batch that can be applied as a single commit.This suggestion is invalid because no changes were made to the code.Suggestions cannot be applied while the pull request is closed.Suggestions cannot be applied while viewing a subset of changes.Only one suggestion per line can be applied in a batch.Add this suggestion to a batch that can be applied as a single commit.Applying suggestions on deleted lines is not supported.You must change the existing code in this line in order to create a valid suggestion.Outdated suggestions cannot be applied.This suggestion has been applied or marked resolved.Suggestions cannot be applied from pending reviews.Suggestions cannot be applied on multi-line comments.Suggestions cannot be applied while the pull request is queued to merge.Suggestion cannot be applied right now. Please check back later.
Investigation on #54477 revealed #53564 as the culprit in the regression for that crate. I've reproduced the regression with the detailed test cases provided. While we figure out how to fix the regression this commit reverts the current culprit.