Hi Henrik,

On Thu, Oct 1, 2015 at 2:18 AM, Henrik Nergaard <henrin10@student.uia.no> wrote:

Hi,

Is there a simple way to query a variable to check how many methods that
access it? (just want to know the size)

This works, but it is quite slow.
(Morph whichSelectorsAccess: #owner) size
Morph withAllSubclasses inject: 0 into: [ :sum :class | sum + (class
whichSelectorsAccess: #owner) size ]

If it is slow then there's some mistake.�� Here are some measurements from the relevant code in my Spur Squeak v 5.0 image:

| visited t |

visited := 0.

t := [self systemNavigation allMethodsSelect: [:m| visited := visited + 1. ��(m readsField: 66) or: (m writesField: 66)] localToPackage: #VMMaker] timeToRun.

{t. visited. t * 1000.0 / visited } #(89 13553 6.566811775990556)

| visited t |

visited := 0.

t := [self systemNavigation allMethodsSelect: [:m| visited := visited + 1. ��(m readsField: 6) or: (m writesField: 6)] localToPackage: #VMMaker] timeToRun.

{t. visited. t * 1000.0 / visited } #(85 13553 6.271674168080867)

��

So 85 milliseconds to analyse 13k methods, for a cost of 6 1/4 secs per method.�� I wouldn't call that slow.

The measurements for Morph and subclasses are even better:

| visited t |

visited := 0.

t := [self systemNavigation allMethodsSelect: [:m| visited := visited + 1. ��(m readsField: 66) or: (m writesField: 66)] localTo: Morph] timeToRun.

{t. visited. t * 1000.0 / visited } #(34 12434 2.7344378317516487)

| visited t |

visited := 0.

t := [self systemNavigation allMethodsSelect: [:m| visited := visited + 1. ��(m readsField: 6) or: (m writesField: 6)] localTo: Morph] timeToRun.

{t. visited. t * 1000.0 / visited } #(34 12434 2.7344378317516487)

34 milliseconds, 2 3/4 usecs per method.

This on a late 2012 Mac Mini 2.3GHz Core i7.

<http://forum.world.st/file/n4852956/aMenuMorph%28885522432%29.png>

Best regards,
Henrik



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best,��Eliot