src: prevent extra copies of TimerWrap::TimerCb
#40665
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I noticed that we were taking `TimerCb` as a `const&` and then copying that into the member. This is completely fine when the constructor is called with an lvalue. However, when called with an rvalue, we can allow the `std::function` to be moved into the member instead of falling back to a copy, so I changed the constructors to take in universal references. Also, `std::function` constructors can take in multiple arguments, so I further modified the constructors to use variadic templates. Signed-off-by: Darshan Sen <[email protected]>
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I had to rebase on top of #40684 to fix the flaky tests. Can this get another review plz? |
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Commit Queue failed- Loading data for nodejs/node/pull/40665 ✔ Done loading data for nodejs/node/pull/40665 ----------------------------------- PR info ------------------------------------ Title src: prevent extra copies of `TimerWrap::TimerCb` (#40665) Author Darshan Sen (@RaisinTen) Branch RaisinTen:src/prevent-extra-copies-of-TimerWrap-TimerCb -> nodejs:master Labels c++, lib / src, author ready Commits 1 - src: prevent extra copies of `TimerWrap::TimerCb` Committers 1 - Darshan Sen PR-URL: https://github.com/nodejs/node/pull/40665 Reviewed-By: Anna Henningsen Reviewed-By: Minwoo Jung ------------------------------ Generated metadata ------------------------------ PR-URL: https://github.com/nodejs/node/pull/40665 Reviewed-By: Anna Henningsen Reviewed-By: Minwoo Jung -------------------------------------------------------------------------------- ⚠ Commits were pushed since the last review: ⚠ - src: prevent extra copies of `TimerWrap::TimerCb` ℹ This PR was created on Sat, 30 Oct 2021 15:56:09 GMT ✔ Approvals: 2 ✔ - Anna Henningsen (@addaleax): https://github.com/nodejs/node/pull/40665#pullrequestreview-793747833 ✔ - Minwoo Jung (@JungMinu): https://github.com/nodejs/node/pull/40665#pullrequestreview-794777797 ✔ Last GitHub Actions successful ℹ Last Full PR CI on 2021-11-03T13:44:37Z: https://ci.nodejs.org/job/node-test-pull-request/40683/ - Querying data for job/node-test-pull-request/40683/ ✔ Build data downloaded ✔ Last Jenkins CI successful -------------------------------------------------------------------------------- ✔ Aborted `git node land` session in /home/runner/work/node/node/.ncuhttps://github.com/nodejs/node/actions/runs/1431079248 |
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I noticed that we were taking `TimerCb` as a `const&` and then copying that into the member. This is completely fine when the constructor is called with an lvalue. However, when called with an rvalue, we can allow the `std::function` to be moved into the member instead of falling back to a copy, so I changed the constructors to take in universal references. Also, `std::function` constructors can take in multiple arguments, so I further modified the constructors to use variadic templates. Signed-off-by: Darshan Sen <[email protected]> PR-URL: #40665 Reviewed-By: Anna Henningsen <[email protected]> Reviewed-By: Minwoo Jung <[email protected]> Reviewed-By: Antoine du Hamel <[email protected]>
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I noticed that we were taking `TimerCb` as a `const&` and then copying that into the member. This is completely fine when the constructor is called with an lvalue. However, when called with an rvalue, we can allow the `std::function` to be moved into the member instead of falling back to a copy, so I changed the constructors to take in universal references. Also, `std::function` constructors can take in multiple arguments, so I further modified the constructors to use variadic templates. Signed-off-by: Darshan Sen <[email protected]> PR-URL: #40665 Reviewed-By: Anna Henningsen <[email protected]> Reviewed-By: Minwoo Jung <[email protected]> Reviewed-By: Antoine du Hamel <[email protected]>
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I noticed that we were taking `TimerCb` as a `const&` and then copying that into the member. This is completely fine when the constructor is called with an lvalue. However, when called with an rvalue, we can allow the `std::function` to be moved into the member instead of falling back to a copy, so I changed the constructors to take in universal references. Also, `std::function` constructors can take in multiple arguments, so I further modified the constructors to use variadic templates. Signed-off-by: Darshan Sen <[email protected]> PR-URL: #40665 Reviewed-By: Anna Henningsen <[email protected]> Reviewed-By: Minwoo Jung <[email protected]> Reviewed-By: Antoine du Hamel <[email protected]>
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* chore: bump node in DEPS to v16.14.0 * src: add flags for controlling process behavior nodejs/node#40339 * src: add x509.fingerprint512 to crypto module nodejs/node#39809 * deps: upgrade to libuv 1.43.0 nodejs/node#41398 * chore: fixup patch indices * chore: add missing filenames nodejs/node#39283 nodejs/node#40665 * crypto: trim input for NETSCAPE_SPKI_b64_decode nodejs/node#40757 * chore: update patches * chore: bump node in DEPS to v16.14.1 * tools: enable no-empty ESLint rule nodejs/node#41831 * chore: update patches * chore: update patches * chore: bump node in DEPS to v16.14.2 * chore: update patches Co-authored-by: electron-roller[bot] <84116207+electron-roller[bot]@users.noreply.github.com> Co-authored-by: Shelley Vohr <[email protected]> Co-authored-by: PatchUp <73610968+patchup[bot]@users.noreply.github.com>
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* chore: bump node in DEPS to v16.14.0 * src: add flags for controlling process behavior nodejs/node#40339 * src: add x509.fingerprint512 to crypto module nodejs/node#39809 * deps: upgrade to libuv 1.43.0 nodejs/node#41398 * chore: fixup patch indices * chore: add missing filenames nodejs/node#39283 nodejs/node#40665 * crypto: trim input for NETSCAPE_SPKI_b64_decode nodejs/node#40757 * chore: update patches * chore: bump node in DEPS to v16.14.1 * tools: enable no-empty ESLint rule nodejs/node#41831 * chore: update patches * chore: update patches * chore: bump node in DEPS to v16.14.2 * chore: update patches Co-authored-by: electron-roller[bot] <84116207+electron-roller[bot]@users.noreply.github.com> Co-authored-by: Shelley Vohr <[email protected]> Co-authored-by: PatchUp <73610968+patchup[bot]@users.noreply.github.com>
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* chore: bump node in DEPS to v16.14.0 * src: add flags for controlling process behavior nodejs/node#40339 * src: add x509.fingerprint512 to crypto module nodejs/node#39809 * deps: upgrade to libuv 1.43.0 nodejs/node#41398 * chore: fixup patch indices * chore: add missing filenames nodejs/node#39283 nodejs/node#40665 * crypto: trim input for NETSCAPE_SPKI_b64_decode nodejs/node#40757 * chore: update patches * chore: bump node in DEPS to v16.14.1 * tools: enable no-empty ESLint rule nodejs/node#41831 * chore: update patches * chore: update patches * chore: bump node in DEPS to v16.14.2 * chore: update patches Co-authored-by: electron-roller[bot] <84116207+electron-roller[bot]@users.noreply.github.com> Co-authored-by: Shelley Vohr <[email protected]> Co-authored-by: PatchUp <73610968+patchup[bot]@users.noreply.github.com>
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I noticed that we were taking
TimerCbas aconst&and then copyingthat into the member. This is completely fine when the constructor is
called with an lvalue. However, when called with an rvalue, we can allow
the
std::functionto be moved into the member instead of falling backto a copy, so I changed the constructors to take in universal
references. Also,
std::functionconstructors can take in multiplearguments, so I further modified the constructors to use variadic
templates.
Signed-off-by: Darshan Sen [email protected]