Slowdown caused by explicitRequirement

In some cases, having traits with methods using explicitRequirement may cause noticable slowdown.

In case of OpenPonk, for larger diagrams, it makes a difference between completely fluent high-fps dragging of elements and ~2 FPS.

Outside OpenPonk, it does not seem to be that much of a problem as I had quite hard time finding pure roassal code that would show the issue:

example

This is the code:

|canvas boxes lines|
"Smalltalk globals select: [ :each | each isTrait and: [each name beginsWith: 'RST'  ]] thenDo: [ :each | each methods select: [ :eachMethod | eachMethod sourceCode includesSubstring: 'explicitRequirement' ] thenDo: [ :eachMethod | eachMethod removeFromSystem ] ]."

canvas := RSCanvas new.
boxes := (1 to: 100) collect: [ :i | RSBox new ].
canvas addAll: boxes.

(1 to: 100) do: [ :i | 
    (i to: 100) do: [ :j | 
        canvas add: (RSArrowedLine new from: (boxes at: i); to: (boxes at: j); withBorderAttachPoint; yourself).
        canvas add: (RSArrowedLine new from: (boxes at: j); to: (boxes at: i); withBorderAttachPoint; yourself).
     ]
].

canvas open.

Smalltalk garbageCollect.

TimeProfiler new runBlock: [ boxes do: [ :each | each translateBy: 1@1 ] ];
    open

For now, I remove the explicitRequirements methods in OpenPonk baseline.

pharo-graphics / Roassal

Slowdown caused by explicitRequirement #12