Ruler slow down when printing the value

[hilaire]

When showValue argument is true, the block returned by method bellow updates slowly.

DrGeoSketch>>float:at:from:to:name:showValue:

It seems related to the message #rename:

 mobile rename: ...

Same issue likely occurs with integer:at:from:to:name:showValue: method.

[hilaire (hilaire-fernandes)]

Modification as bellow, at the end improve a bit the performances:

^ isValueDisplay
   ifTrue: [[|value |
 value := mobile mathItem abscissa * ( endValue - startValue) + startValue.
 mobile costume textMorph privateSetContents: (name, ' = ', (value printShowingDecimalPlaces: 2 )).
 value]]
   ifFalse: [[mobile mathItem abscissa * ( endValue - startValue) + startValue]]

[hilaire (hilaire-fernandes)]

Message #contentsClipped: in place of #privateSetContents: is more appropriate.

[hilaire (hilaire-fernandes)]

Preliminary analysis with MessageTally shows that replacing with message #contentsClipped: gives a x5 improvement in time of execution.