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Merged
merged 1 commit into from
May 17, 2018

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eira-fransham
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@eira-fransham eira-fransham commented May 17, 2018

Preliminary results aren't good, although no benches check for cache efficiency (for example Vec<Vec<T>> vs Vec<SmallVec<[T; N]>>).

Here's a comparison. I used sed to split the _vec benchmarks out and rename them to have the same name, so cargo benchcmp can understand them.

 name                     vec.bench ns/iter          smallvec.bench ns/iter          diff ns/iter   diff %  speedup 
 bench_extend             69                         53                                       -16  -23.19%   x 1.30 
 bench_extend_from_slice  64                         52                                       -12  -18.75%   x 1.23 
 bench_from_slice         34                         52                                        18   52.94%   x 0.65 
 bench_insert             1,228                      1,202                                    -26   -2.12%   x 1.02 
 bench_macro_from_elem    50                         66                                        16   32.00%   x 0.76 
 bench_macro_from_list    33                         47                                        14   42.42%   x 0.70 
 bench_push               359                        424                                       65   18.11%   x 0.85 
 bench_pushpop            251                        348                                       97   38.65%   x 0.72 

Closes #87


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@mbrubeck
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@bors-servo r+

Thanks!

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📌 Commit 291eb90 has been approved by mbrubeck

bors-servo pushed a commit that referenced this pull request May 17, 2018
Add benchmarks for Vec to compare to SmallVec

Preliminary results aren't good, although no benches check for cache efficiency (for example `Vec<Vec<T>>` vs `Vec<SmallVec<[T; N]>>`).

Here's a comparison. I used `sed` to split the `_vec` benchmarks out and rename them to have the same name, so `cargo benchcmp` can understand them.

```
 name                     vec.bench ns/iter          smallvec.bench ns/iter          diff ns/iter   diff %  speedup
 bench_extend             69                         53                                       -16  -23.19%   x 1.30
 bench_extend_from_slice  64                         52                                       -12  -18.75%   x 1.23
 bench_from_slice         34                         52                                        18   52.94%   x 0.65
 bench_insert             1,228                      1,202                                    -26   -2.12%   x 1.02
 bench_macro_from_elem    50                         66                                        16   32.00%   x 0.76
 bench_macro_from_list    33                         47                                        14   42.42%   x 0.70
 bench_push               359                        424                                       65   18.11%   x 0.85
 bench_pushpop            251                        348                                       97   38.65%   x 0.72
```

Closes #87

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⌛ Testing commit 291eb90 with merge 6e061f3...

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☀️ Test successful - status-travis
Approved by: mbrubeck
Pushing 6e061f3 to master...

@bors-servo bors-servo merged commit 291eb90 into servo:master May 17, 2018
mbrubeck added a commit to mbrubeck/rust-smallvec that referenced this pull request Jul 19, 2018
Changes in this release:

* Fix possible double-free in `insert_many` when passed an iterator that
  panics in `next` (servo#103)
* Add a new `union` feature (disabled by default) that reduces the size
  of the SmallVec struct (servo#94)
* Improve performance of `extend` and `from_elem` (servo#93)
* Improve performance of `drop` (servo#100)
* Update dev-dependency on `bincode` (servo#102)
* Update to build without `std` on current Rust nightly (servo#104)
* Additional benchmarks (servo#95, servo#97).
mbrubeck added a commit to mbrubeck/rust-smallvec that referenced this pull request Jul 19, 2018
Changes in this release:

* Fix possible double-free in `insert_many` when passed an iterator that
  panics in `next` (servo#103)
* Add a new `union` feature (disabled by default) that reduces the size
  of the SmallVec struct (servo#94)
* Improve performance of `extend` and `from_elem` (servo#93)
* Improve performance of `drop` (servo#100)
* Update dev-dependency on `bincode` (servo#102)
* Update to build without `std` on current Rust nightly (servo#104)
* Additional benchmarks (servo#95, servo#97).
@mbrubeck mbrubeck mentioned this pull request Jul 19, 2018
bors-servo pushed a commit that referenced this pull request Jul 19, 2018
Version 0.6.3

Changes in this release:

* Fix possible double-free in `insert_many` when passed an iterator that panics in `next` (#103)
* Add a new `union` feature (disabled by default) that reduces the size of the SmallVec struct (#94)
* Improve performance of `extend` and `from_elem` (#93)
* Improve performance of `drop` (#100)
* Update to build without `std` feature on current Rust nightly (#104)
* Additional benchmarks (#95, #97)
* Update dev-dependency on `bincode` (#102)

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3 participants