[squeak-dev] Slow your image to a crawl with this one weird trick!
Marcel Taeumel
marcel.taeumel at hpi.de
Fri Aug 23 06:39:36 UTC 2019
Hmm... HierarchyBrowser has a cache in #classList. Browser has no such cache. Browser >> #hierarchicalClassList is slow.
Also, class compilation is so slow because of SmalltalkImage >> #logChange:.
84.7% {13730ms} SmalltalkImage>>logChange:
84.6% {13718ms} SmalltalkImage>>forceChangesToDisk
79.6% {12899ms} MultiByteFileStream(StandardFileStream)>>close
|79.6% {12899ms} MultiByteFileStream(StandardFileStream)>>unregister
4.9% {798ms} SecurityManager class>>default
Best,
Marcel
Am 22.08.2019 18:45:43 schrieb gettimothy via Squeak-dev <squeak-dev at lists.squeakfoundation.org>:
"Try this one wierd trick"
Object subclass: #Foo
instanceVariableNames: ''
classVariableNames: 'PageId PageTitle Lua'
poolDictionaries: ''
category: 'Foo-Bar'.
"Open a browser and highlight the Foo-Bar category. Then.."
1 to:3000 do: [:each | | newclassname|
newclassname := ('FooBar', each asString) asSymbol.
Foo subclass: newclassname
instanceVariableNames: ''
classVariableNames: ''
poolDictionaries: ''
category: 'Foo-Bar']
"Your system should slow to a crawl.
Be patient and click off of the 'Foo-Bar' category and the system should free up.
Now open a HierarchyBrowser on Foo
Things will continue to work smoothly.
Conclusion? Something funky with Browser.
"
Foo allSubclasses do: [:each |
Smalltalk removeClassNamed: (each name)
]
Smalltalk removeClassNamed: #Foo
ClassOrganizer removeCategory:'Foo-Bar'
Motivation.
I am on a "import that as a class" kick for SeasideDock and the WikitextParser I am working on.
I am comfortable working with these classes as I have learned to NEVER open certain categories and use the HierarchyBrowser when I need to scan the classes therein.
Thought somebody might be intrigued with the "Why" of this on purely technical grounds. I am not that guy (:
cheers.
t
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