https://bugzilla.wikimedia.org/show_bug.cgi?id=70006
Bug ID: 70006
Summary: LuaSandbox reports substantially higher memory
utilization under HHVM
Product: MediaWiki extensions
Version: master
Hardware: All
OS: All
Status: NEW
Keywords: hiphop
Severity: normal
Priority: Unprioritized
Component: Scribunto
Assignee: [email protected]
Reporter: [email protected]
CC: [email protected], [email protected],
[email protected], [email protected]
Web browser: ---
Mobile Platform: ---
Previewing a no-diff edit to the Barack Obama article on enwiki utilizes vastly
more memory under HHVM than it does with PHP (50.21 MB vs. 5.33 MB). On HHVM,
it is enough to exhaust the memory limit and cause script errors to occur. A
memory leak seems likely.
Below are NewPP limit reports for HHVM and PHP:
HHVM:
<!--
NewPP limit report
Parsed by mw1017
CPU time usage: 6.575 seconds
Real time usage: 5.359 seconds
Preprocessor visited node count: 36328/1000000
Preprocessor generated node count: 134482/1500000
Post‐expand include size: 667573/2048000 bytes
Template argument size: 33250/2048000 bytes
Highest expansion depth: 23/40
Expensive parser function count: 13/500
Lua time usage: 1.600/10.000 seconds
Lua memory usage: 50.21 MB/50 MB
-->
PHP:
<!--
NewPP limit report
Parsed by mw1021
CPU time usage: 15.661 seconds
Real time usage: 16.292 seconds
Preprocessor visited node count: 44800/1000000
Preprocessor generated node count: 146396/1500000
Post‐expand include size: 1567883/2048000 bytes
Template argument size: 215760/2048000 bytes
Highest expansion depth: 23/40
Expensive parser function count: 39/500
Lua time usage: 2.165/10.000 seconds
Lua memory usage: 5.33 MB/50 MB
Lua Profile:
Scribunto_LuaSandboxCallback::getExpandedArgument 1320 ms
36.3%
recursiveClone <mwInit.lua:11> 380 ms
10.4%
dataWrapper <mw.lua:665> 340 ms
9.3%
Scribunto_LuaSandboxCallback::getAllExpandedArguments 240 ms
6.6%
Scribunto_LuaSandboxCallback::getEntity 160 ms
4.4%
mw.executeModule <mw.lua:465> 140 ms
3.8%
? 120 ms
3.3%
selectone <Module:Citation/CS1:1026> 100 ms
2.7%
<Module:Citation/CS1:102> 100 ms
2.7%
(for generator) 80 ms
2.2%
[others] 660 ms
18.1%
-->
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