Skip to content
New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Jump to bottom

macros: improve expansion performance #37569

Merged
merged 10 commits into from
Nov 6, 2016
Merged

macros: improve expansion performance #37569

merged 10 commits into from
Nov 6, 2016

Conversation

jseyfried
Copy link
Contributor

@jseyfried jseyfried commented Nov 3, 2016 •
edited
Loading

#34908 regressed expansion performance on recursive, tt-heavy workloads.
This PR fixes that regression, further improves performance on recursive, tt-heavy workloads, and makes a variety of other improvements to parsing and expansion performance.

Expansion performance improvements:

Test case Run-time Memory usage
libsyntax 8% 10%
librustc 15% 6%
librustc_trans 30% 6%
#37074 20% 15%
#34630 40% 8%

r? @eddyb

@jseyfried
Copy link
Contributor Author

jseyfried commented Nov 3, 2016 •
edited
Loading

The ast::ExprKind commit is the AST version of #37445 (h/t @nnethercote).
cc @durka @nrc

@eddyb
Copy link
Member

eddyb commented Nov 3, 2016

@Manishearth r=me

@Manishearth
Copy link
Member

@bors r=eddyb

cc @dtolnay

@bors
Copy link
Contributor

bors commented Nov 3, 2016

📌 Commit e652060 has been approved by eddyb

@bluss
Copy link
Member

bluss commented Nov 4, 2016

Since not needing ast coercion is a feature, it should have tests so that it is not broken by this improvement. Are there any tests? I didn't find any in the tree.

@jseyfried
Copy link
Contributor Author

jseyfried commented Nov 4, 2016 •
edited
Loading

By "not needing ast coercion", do you mean #22819? That is tested here.

@bluss
Copy link
Member

bluss commented Nov 4, 2016

great! I overlooked compile-fail.

@jseyfried
Copy link
Contributor Author

@bors r=eddyb

@bors
Copy link
Contributor

bors commented Nov 4, 2016

📌 Commit 51104e5 has been approved by eddyb

alexcrichton added a commit to alexcrichton/rust that referenced this pull request Nov 4, 2016
@alexcrichton
Rollup merge of rust-lang#37569 - jseyfried:improve_expansion_perf, r…
bcd1e13 
…=eddyb

macros: improve expansion performance

This PR fixes that regression, further improves performance on recursive, `tt`-heavy workloads, and makes a variety of other improvements to parsing and expansion performance.

Expansion performance improvements:

| Test case      | Run-time | Memory usage |
| -------------- | -------- | ------------ |
| libsyntax      | 8%       | 10%          |
| librustc       | 15%      | 6%           |
| librustc_trans | 30%      | 6%           |
| rust-lang#37074         | 20%      | 15%          |
| rust-lang#34630         | 40%      | 8%           |

r? @eddyb
@alexcrichton alexcrichton mentioned this pull request Nov 4, 2016
Merged
bors added a commit that referenced this pull request Nov 5, 2016
@bors
Auto merge of #37597 - alexcrichton:rollup, r=alexcrichton
16d5330 
Rollup of 24 pull requests

- Successful merges: #37255, #37317, #37408, #37410, #37422, #37427, #37470, #37501, #37537, #37556, #37557, #37564, #37565, #37566, #37569, #37574, #37577, #37579, #37583, #37585, #37586, #37587, #37589, #37596
- Failed merges: #37521, #37547
alexcrichton added a commit to alexcrichton/rust that referenced this pull request Nov 5, 2016
@alexcrichton
Rollup merge of rust-lang#37569 - jseyfried:improve_expansion_perf, r…
b9cbbe1 
…=eddyb

macros: improve expansion performance

This PR fixes that regression, further improves performance on recursive, `tt`-heavy workloads, and makes a variety of other improvements to parsing and expansion performance.

Expansion performance improvements:

| Test case      | Run-time | Memory usage |
| -------------- | -------- | ------------ |
| libsyntax      | 8%       | 10%          |
| librustc       | 15%      | 6%           |
| librustc_trans | 30%      | 6%           |
| rust-lang#37074         | 20%      | 15%          |
| rust-lang#34630         | 40%      | 8%           |

r? @eddyb
bors added a commit that referenced this pull request Nov 6, 2016
@bors
Auto merge of #37597 - alexcrichton:rollup, r=alexcrichton
3fc8304 
Rollup of 24 pull requests

- Successful merges: #37255, #37317, #37408, #37410, #37422, #37427, #37470, #37501, #37537, #37556, #37557, #37564, #37565, #37566, #37569, #37574, #37577, #37579, #37583, #37585, #37586, #37587, #37589, #37596
- Failed merges: #37521, #37547
@jseyfried jseyfried deleted the improve_expansion_perf branch November 6, 2016 09:27
@bors bors merged commit 51104e5 into rust-lang:master Nov 6, 2016
@nnethercote
Copy link
Contributor

AFAICT this PR regressed the speed of html5ever compilation in rustc-benchmarks. perf.rust-lang.org is showing a 6% regression for html5ever this week while other benchmarks are basically unchanged. This PR is one of the PRs that show up in the regressing measurement, and I have profiling data that corroborates.

One cause of this is the span_to_filename call in Parser::new_with_doc_flag, which causes 800k extra allocations. Another cause is an extra 800k allocations in macro_parser::parse. I think this is because of the Box::new(rdr) at the top, but I'm not certain. (I found these by comparing DHAT output for before and after.)

I think these are not the only parts of the change that lead to regressions, but it's less obvious from my profiling what else might be a factor, other than vec and slice operations are showing up higher in the profile. (I got that from the Cachegrind output.)

@jseyfried
Copy link
Contributor Author

@nnethercote Thanks, I'll fix the regression ASAP.

@Mark-Simulacrum Mark-Simulacrum mentioned this pull request Nov 11, 2016
Merged
bors added a commit that referenced this pull request Nov 14, 2016
@bors
Auto merge of #37701 - Mark-Simulacrum:macro-parser-impvement, r=jsey…
87b76a5 
…fried

Macro parser performance improvements and refactoring

This PR locally increased performance of #37074 by ~6.6 minutes.

Follow up to #37569, but doesn't focus explicitly on expansion performance.

History is relatively clean, but I can/will do some more polishing if this is deemed mergeable. Partially posting this now so I can get Travis to run tests for me.

r? @jseyfried
@jseyfried jseyfried mentioned this pull request Dec 6, 2016
Closed
@Mark-Simulacrum Mark-Simulacrum mentioned this pull request May 16, 2017
Closed
Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment
Reviewers
No reviews
Assignees

@eddyb eddyb

Labels
None yet
Projects
None yet
Milestone
No milestone
Development

Successfully merging this pull request may close these issues.
6 participants
@jseyfried @eddyb @Manishearth @bors @bluss @nnethercote