discourse/lib/post_action_creator.rb
Guo Xiang Tan 5d4221fbe1 PERF: Avoid calling expensive PostGuardian#can_see_post? multiple times.
Before

```
Your Results: (note for timings- percentile is first, duration is second
in millisecs)
---
topic_admin:
  50: 19
  75: 19
  90: 21
  99: 27
topic:
  50: 56
  75: 62
  90: 64
  99: 99
timings:
  load_rails: 1262
ruby-version: 2.4.1-p111
rss_kb: 198432
pss_kb: 136612
virtual: physical
architecture: amd64
operatingsystem: Ubuntu
memorysize: 15.59 GB
kernelversion: 4.10.0
physicalprocessorcount: 1
processor0: Intel(R) Core(TM) i7-6700K CPU @ 4.00GHz
rss_kb_9877: 327892
pss_kb_9877: 263671
rss_kb_9946: 325468
pss_kb_9946: 261671
rss_kb_10153: 326456
pss_kb_10153: 262657
```

After

```
Your Results: (note for timings- percentile is first, duration is second
in millisecs)
---
topic_admin:
  50: 18
  75: 18
  90: 20
  99: 28
topic:
  50: 41
  75: 42
  90: 46
  99: 49
timings:
  load_rails: 1201
ruby-version: 2.4.1-p111
rss_kb: 187936
pss_kb: 123596
virtual: physical
architecture: amd64
operatingsystem: Ubuntu
memorysize: 15.59 GB
kernelversion: 4.10.0
physicalprocessorcount: 1
processor0: Intel(R) Core(TM) i7-6700K CPU @ 4.00GHz
rss_kb_26478: 342360
pss_kb_26478: 276696
rss_kb_26547: 340368
pss_kb_26547: 275930
rss_kb_26747: 338964
pss_kb_26747: 274466
```
2017-09-08 14:07:24 +08:00

24 lines
433 B
Ruby

# creates post actions based on a post and a user
class PostActionCreator
def initialize(user, post)
@user = user
@post = post
end
def perform(action)
guardian.ensure_post_can_act!(@post, action, opts: {
taken_actions: PostAction.counts_for([@post].compact, @user)[@post&.id]
})
PostAction.act(@user, @post, action)
end
private
def guardian
@guardian ||= Guardian.new(@user)
end
end