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rustdoc-json: buffer output#93954

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Feb 19, 2022
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rustdoc-json: buffer output#93954
bors merged 1 commit intorust-lang:masterfrom
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@aDotInTheVoid aDotInTheVoid commented Feb 13, 2022 •
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It turns out we were doing syscalls for each part of the json syntax

Before:

...
[pid 1801267] write(5, "\"", 1)         = 1
[pid 1801267] write(5, ",", 1)          = 1
[pid 1801267] write(5, "\"", 1)         = 1
...

After:

[pid 1974821] write(5, "{\"root\":\"0:0\",\"crate_version\":nu"..., 1575) = 1575

In one benchmark (one struct, almost all time in std), this gives ~2x perf

r? @CraftSpider

@rustbot modify labels: +A-rustdoc-json +T-rustdoc -A-testsuite

@rustbot rustbot added the T-rustdoc Relevant to the rustdoc team, which will review and decide on the PR/issue. label Feb 13, 2022
@rust-highfive rust-highfive added the S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. label Feb 13, 2022
@rustbot rustbot added A-rustdoc-json Area: Rustdoc JSON backend A-testsuite Area: The testsuite used to check the correctness of rustc and removed A-testsuite Area: The testsuite used to check the correctness of rustc labels Feb 13, 2022
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Mark-Simulacrum commented Feb 15, 2022

@bors r+ rollup=never (perf?)

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bors commented Feb 15, 2022

📌 Commit ae15822 has been approved by Mark-Simulacrum

@bors bors added S-waiting-on-bors Status: Waiting on bors to run and complete tests. Bors will change the label on completion. and removed S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. labels Feb 15, 2022
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bors commented Feb 15, 2022

⌛ Testing commit ae15822 with merge 8859ab012852ee4bcb88a3deb3abe1b5c7a35794...

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bors commented Feb 15, 2022

💔 Test failed - checks-actions

@bors bors added S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. and removed S-waiting-on-bors Status: Waiting on bors to run and complete tests. Bors will change the label on completion. labels Feb 15, 2022
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rust-log-analyzer commented Feb 15, 2022

A job failed! Check out the build log: (web) (plain)

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aDotInTheVoid commented Feb 16, 2022

Seems spurious: https://github.com/rust-lang-ci/rust/runs/5201658513?check_suite_focus=true

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aDotInTheVoid commented Feb 16, 2022

@bors retry

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bors commented Feb 16, 2022

@aDotInTheVoid: 🔑 Insufficient privileges: not in try users

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CraftSpider commented Feb 18, 2022

@bors retry

@bors bors added S-waiting-on-bors Status: Waiting on bors to run and complete tests. Bors will change the label on completion. and removed S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. labels Feb 18, 2022
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Mark-Simulacrum commented Feb 19, 2022

@bors rollup=maybe

I don't think this is likely to affect perf in practice, so let's permit rolling it up.

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aDotInTheVoid commented Feb 19, 2022

It only effects perf on the rustdoc json backend, which we currently dont track perf for, but we should

@aDotInTheVoid aDotInTheVoid mentioned this pull request Feb 19, 2022
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@matthiaskrgr matthiaskrgr mentioned this pull request Feb 19, 2022
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bors added a commit to rust-lang-ci/rust that referenced this pull request Feb 19, 2022
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Auto merge of rust-lang#94148 - matthiaskrgr:rollup-jgea68f, r=matthi…
e08d569 
…askrgr

Rollup of 7 pull requests

Successful merges:

 - rust-lang#92902 (Improve the documentation of drain members)
 - rust-lang#93658 (Stabilize `#[cfg(panic = "...")]`)
 - rust-lang#93954 (rustdoc-json: buffer output)
 - rust-lang#93979 (Add debug assertions to validate NUL terminator in c strings)
 - rust-lang#93990 (pre rust-lang#89862 cleanup)
 - rust-lang#94006 (Use a `Field` in `ConstraintCategory::ClosureUpvar`)
 - rust-lang#94086 (Fix ScalarInt to char conversion)

Failed merges:

r? `@ghost`
`@rustbot` modify labels: rollup
@bors bors merged commit 554aea9 into rust-lang:master Feb 19, 2022
@rustbot rustbot added this to the 1.60.0 milestone Feb 19, 2022
@aDotInTheVoid aDotInTheVoid deleted the json-buffer branch February 21, 2023 07:29
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A-rustdoc-json Area: Rustdoc JSON backend S-waiting-on-bors Status: Waiting on bors to run and complete tests. Bors will change the label on completion. T-rustdoc Relevant to the rustdoc team, which will review and decide on the PR/issue.

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