>>>>> "Dov" == Dov Feldstern <[EMAIL PROTECTED]> writes:
Dov> Right now it's being called on every cursor blink, I think (I put Dov> in a debug printout, and it prints on every blink); and what it's Dov> doing every time is to loop over all the characters from the Dov> beginning of the line until the current position, and sum up the Dov> widths, in order to get to the current X position. Same thing Dov> when you move one position to the right or to the left --- the Dov> entire summing start from the beginning of the line. But this Dov> calculation was already done when we painted the screen, so Dov> there's no need to do it again. Dov> This may not be very costly relative to the painting, but it's Dov> certainly much more wasteful than it needs to be. But iterating over a single line is very cheap, isn't it? The rule is: do not try to optimize until the profiler told you that you should do so. JMarc
