Preparser Cache
Author Message
This is a fairly simple pre-parser modification which should speed up one of MyBB's slowest functions.
Basically, MyBB's MyCode parser is rather slow; this plugin speeds this component up by caching the result so that the parser does not have to be run on every single page request (this is assuming that SHA1 hashing + a single query with some string manipulation is faster than running the parser 20+ times).

This plugin is compatible with all supported DB engines (SQLite in MyBB 1.6.0 is bugged, so cannot be tested).

Compatibility with other plugins
Due to the fact that this modification changes the environment under which the parser is run, I cannot guarantee that this will work with all MyCode/HTML or parser related plugins, especially those that may display posts differently to different users (on the other hand, this actually may have the potential to remove some of the issues in some poorly coded modifications).  Custom MyCodes should still work, and there is a workaround for the vB Quote plugin.
This will not work with the HTML in Posts plugin.

About design
The design of this is much simpler than my mod for MyBB 1.2, and as such, is nowhere near as aggressive, however, it's something I (originally!) banged up together in about an hour, and gets most of the benefits anyway.  It differs from both my 1.2 mod, and Ryan Gordon's 1.4 mod in that it operates at a parser level instead of at the showthread/postbit level.

The plugin only does posts and signatures on showthread.php, but it can be quite easily modified for other places, as it operates on a parser level.  Again, this was something I wrote fairly quickly, and could use a number of improvements in some areas.
The cache is periodically cleaned via a cleanup task.

Note
Note that this plugin also provides a way to manually clear the cache, under the Recount & Rebuild section of the AdminCP, should you ever have the need to do so.

Known Issues
  • Attachments embedded with the [attachment=id] code may not have their download count updated
  • A very minor one - it's possible to cause this plugin to display removed attachments embedded in the post (will be a dead link though).  Standard MyBB behavior will simply ignore the [attachment=id] code.  This will do the same if the post is updated in any way.
  • For MyBB 1.8, quote times will be forced to use absolute time (instead of relative).  For earlier versions, there is no change to the timestamp displayed, however the "Today" and "Yesterday" text will never get updated (until a cache clear), so this can be inaccurate if this occurs



Simple Benchmark
Just a simple benchmark I performed to get an idea of the speed gains of this plugin.  I'm benchmarking this page, with and without the plugin.  I guess the page is somewhat a good candidate for this plugin, although I didn't exactly cherry pick it on purpose.

Times were recorded by just using the time metric at the bottom of the page.  Note that the plugin does a number of things after the timer has completed, so I've also made a comparison after modifying MyBB's timer to more accurately measure the time (if you don't perform this modification, the preparser mod should pretty much always make your showthread pages seem to run faster).
Pages were loaded 3 times.

Standard behaviour: 0.2359838s, 0.2380810s, 0.2462718s
Standard behaviour, after editing timer: 0.2320759s, 0.2335730s, 0.2380040s
With preparser (with timer edit): 0.1327140s, 0.1319780s, 0.1258268s
With preparser (without timer edit (inaccurate)): 0.1291881s, 0.1186280s, 0.1211529s

Initial load with preparser, timer edit: 0.2454121s (this is the page load which caches everything - it'll be slower than normal page loads, but subsequent requests will be much faster)

1.0 benchmarks:
Standard behaviour: 0.2242870s, 0.2201211s, 0.2377510s
Standard behaviour, after editing timer: 0.2399340s, 0.2398720s, 0.2158720s
With preparser (with timer edit): 0.1303909s, 0.1500199s, 0.1303349s
With preparser (without timer edit (inaccurate)): 0.1157429s, 0.1143448s, 0.1083250s
(This post was last modified: 04-02-2017 10:23 PM by ZiNgA BuRgA.)
Find all posts by this user
Quote this message in a reply
Download: preparser-1.13.7z (4.52 KB)
Plugin Version: 1.13
Last Updated: 04-02-2017, 10:23 PM

Downloads: 1,555
MyBB Compatibility: 1.4.x, 1.6.x, 1.8.x
Plugin License: WTFPLv2
Uploader: ZiNgA BuRgA
Shemo Offline
Member
***
Posts: 184
Joined: Jan 2008
Post: #41
RE: Preparser Cache
(08-09-2012 02:37 PM)ZiNgA BuRgA Wrote:  Nope.

is there a way to force your plugin to produce a log if someone receives that error?
08-09-2012 03:38 PM
Find all posts by this user Quote this message in a reply
ZiNgA BuRgA Offline
Fag
*******
Posts: 3,338
Joined: Jan 2008
Post: #42
RE: Preparser Cache
Yeah possibly, but that'll be an exercise for you Tongue

My Blog
08-10-2012 07:48 AM
Find all posts by this user Quote this message in a reply
Pirata Nervo Offline
Member
***
Posts: 235
Joined: Jan 2008
Post: #43
RE: Preparser Cache
You sure it doesn't work with the HTML in Posts plugin? I've re-written it entirely in the latest version so I'd just like to note that it may work (I haven't tried it) - unless you've tried the latest version.
08-10-2012 07:01 PM
Find all posts by this user Quote this message in a reply
ZiNgA BuRgA Offline
Fag
*******
Posts: 3,338
Joined: Jan 2008
Post: #44
RE: Preparser Cache
I was at the time of writing.  If that's changed then just tell me so and I'll update the first post.

My Blog
08-11-2012 05:07 PM
Find all posts by this user Quote this message in a reply
Verilog Offline
Junior Member
**
Posts: 44
Joined: Nov 2013
Post: #45
RE: Preparser Cache
I tried this plugin today and the results were great
But i had a problem with this plugin, whenever i click a setting in admin cp it just reloads the page but doesn't show the confirmation message. After i refresh 1-2 time then it shows settings saved
It is now happening with all pages, can you tell me how to fix this ?
01-05-2014 02:44 PM
Find all posts by this user Quote this message in a reply
ZiNgA BuRgA Offline
Fag
*******
Posts: 3,338
Joined: Jan 2008
Post: #46
RE: Preparser Cache
The plugin doesn't really have much of an effect on the ACP...
Maybe try deactivating it to confirm that it is indeed this plugin.

My Blog
01-06-2014 05:17 PM
Find all posts by this user Quote this message in a reply
Verilog Offline
Junior Member
**
Posts: 44
Joined: Nov 2013
Post: #47
RE: Preparser Cache
(01-06-2014 05:17 PM)ZiNgA BuRgA Wrote:  The plugin doesn't really have much of an effect on the ACP...
Maybe try deactivating it to confirm that it is indeed this plugin.

I deactivated this plugin, but then also i am having problems.
But before i installed the plugin, i didn't had these problems
01-10-2014 11:31 AM
Find all posts by this user Quote this message in a reply
ZiNgA BuRgA Offline
Fag
*******
Posts: 3,338
Joined: Jan 2008
Post: #48
RE: Preparser Cache
It's likely something else happened.
Eg your server is not sending no-cache headers, or your browser is caching pages when it shouldn't.
There's really no reason why this plugin should have any affect on that.

My Blog
01-10-2014 03:42 PM
Find all posts by this user Quote this message in a reply
ZiNgA BuRgA Offline
Fag
*******
Posts: 3,338
Joined: Jan 2008
Post: #49
RE: Preparser Cache
v1.12: MyBB 1.8 compatibility fixes

My Blog
12-09-2014 05:29 PM
Find all posts by this user Quote this message in a reply
Shemo Offline
Member
***
Posts: 184
Joined: Jan 2008
Post: #50
RE: Preparser Cache
(12-09-2014 05:29 PM)ZiNgA BuRgA Wrote:  v1.12: MyBB 1.8 compatibility fixes

zinga,

would this replace both the pre-parse post & signature plugin that Ryan Gordon wrote?
04-06-2015 07:54 AM
Find all posts by this user Quote this message in a reply


Forum Jump: