[squeak-dev] wait2ms

Bert Freudenberg bert at freudenbergs.de
Fri Feb 1 20:20:42 UTC 2013

On 01.02.2013, at 21:05, Stéphane Rollandin <lecteur at zogotounga.net> wrote:

> Hello,
> Studying Scratch code I stumbled upon the fact that EventSensor primitives such as #primMousePt send a #wait2ms message before answering.
> In Squeak 2.8 #primMousePt was indeed a primitive; it still is in the InputSensor implementation.
> So my question is: what is the rationale for loosing 2 milliseconds everytime one asks for mouse position ?
> Stef

In MVC you often have a busy loop. The wait ensures that Squeak is not hogging the whole system in that case. 

- Bert -

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