From: gamelinks007@gmail.com
To: ruby-core@ruby-lang.org
Subject: [ruby-core:99476] [Ruby master Bug#17101] YAML.load_file: Massive slowdown under Ruby 2.7 vs. Ruby 2.4
Date: Tue, 04 Aug 2020 10:13:39 +0000 (UTC) [thread overview]
Message-ID: <redmine.journal-86931.20200804101337.8636@ruby-lang.org> (raw)
In-Reply-To: redmine.issue-17101.20200803151924.8636@ruby-lang.org
Issue #17101 has been updated by S_H_ (Shun Hiraoka).
I tried this benchmark in several ruby's(Ubuntu18.04 in WSL2. using `rbenv`).
```yaml
prelude: |
require 'yaml'
benchmark:
load_file: YAML.load_file('qlnv_h_h.yaml')
loop_count: 1
```
And, result.
```bash
sh@MyComputer:~/rubydev/bugs$ benchmark-driver yml.yaml --output compare --rbenv '2.4.4;2.5.8;2.6.6;2.7.1;2.8.0-dev'
Calculating -------------------------------------
2.4.4 2.5.8 2.6.6 2.7.1 2.8.0-dev
load_file 0.113 0.075 0.076 0.058 0.134 i/s - 1.000 times in 8.839451s 13.406090s 13.240691s 17.256679s 7.435239s
Comparison:
load_file
2.8.0-dev: 0.1 i/s
2.4.4: 0.1 i/s - 1.19x slower
2.6.6: 0.1 i/s - 1.78x slower
2.5.8: 0.1 i/s - 1.80x slower
2.7.1: 0.1 i/s - 2.32x slower
```
Between `2.5` and `2.7` is slow, but `master(2.8.9-dev)` is very fast(faster than `2.4`!).
And checked `yaml` versions(in theseruby's).
| Ruby version | YAML version |
|:--:|:--:|
|2.8.0-dev | 0.2.5 |
|2.7.1 | 0.2.1 |
|2.6.6 | 0.2.1 |
|2.5.8 | 0.1.7 |
|2.4.4 | 0.1.7 |
----------------------------------------
Bug #17101: YAML.load_file: Massive slowdown under Ruby 2.7 vs. Ruby 2.4
https://bugs.ruby-lang.org/issues/17101#change-86931
* Author: fitmap (Justin Peal)
* Status: Open
* Priority: Normal
* ruby -v: ruby 2.7.1p83 (2020-03-31 revision a0c7c23c9c) [x64-mingw32]
* Backport: 2.5: UNKNOWN, 2.6: UNKNOWN, 2.7: UNKNOWN
----------------------------------------
When use Ruby 2.4, the following program runs fast, After ungrade to Ruby 2.7, the same program runs very very slow. Please unzip the attach first for test.
require 'yaml'
YAML.load_file('qlnv_h_h.yaml')
---Files--------------------------------
qlnv_h_h.7z (1.41 MB)
--
https://bugs.ruby-lang.org/
next prev parent reply other threads:[~2020-08-04 10:13 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-08-03 15:19 [ruby-core:99454] [Ruby master Bug#17101] YAML.load_file: Massive slowdown under Ruby 2.7 vs. Ruby 2.4 fitmap
2020-08-03 18:51 ` [ruby-core:99461] " Greg.mpls
2020-08-04 10:13 ` gamelinks007 [this message]
2020-08-04 15:36 ` [ruby-core:99477] " fitmap
2021-07-02 16:15 ` [ruby-core:104474] " merch-redmine
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