On Mon, 15 Jun 2020 09:44:40 GMT, Ambarish Rapte <[email protected]> wrote:
>> a bit less flippant: really interested in the measurements - certainly, they >> are somewhere but can't find anything. Any >> pointer where to look? > > Even I do not know if there are any performance measurements for such > scenario. :) May be @kevinrushforth could help in > that. I just counted the calls by adding a log, and observed that for a > ListView with only one item, these three > methods combinely are called 23 times when the Stage is displayed for the > first time and 5 times when the item is > selected. (updated the counts after rechecking, looks like the methods are > invoked for empty cells too, which seems > correct) hmm, do you mean a list with height of one cell only? My experiment (having counters per instance and per computeXXHeight), logs 1 (or 2) for computePref with fixed size and 5 (1 each for min/max and 3 for pref) without fixedSize per layout pass. So it's 5* access of either the local field or the listView method .. wouldn't expect any problems, but then assumed performance is reading in coffee ground :) Let's hope there are some metrics to use :) ------------- PR: https://git.openjdk.java.net/jfx/pull/251
