[Tcl-bugs] [Tk] (mtmcp_) tkt (Open): Cache Composed Pixmaps for Ttk Image Elements

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Ticket Change [086058e0054338fb0c520761cf84caa354cf44c17e349c4186d61c15176d8678]
  [Cache Composed Pixmaps for Ttk Image Elements]
  By      mtmcp_
  For     Tk
  On      2026-06-09T14:38:00.685
  Details https://core.tcl-lang.org/tk/tinfo?name=086058e0054338fb0c520761cf84caa354cf44c17e349c4186d61c15176d8678
  Ticket  https://core.tcl-lang.org/tk/tktview/7caf9e9edcfbee425264b76be61c973c7bd2db1f

Changed Fields
  icomment: Okay, so I implemented TkpPutRGBAImage on Windows (see latest
            ttk-layout-node-cache.diff). With that change plus the layout-node
            caching mechanism, the results seem pretty solid! The gap between
            opaque and transparent is ~ 40ms, and the overall cost is dramatically
            less than without this patch.

            Horizontal and vertical resize are better than diagonal,
            understandably, so the overall performance improvement with this
            change will be really nice on Windows, and Linux given regular usage
            (not the benchmark script). Once macOS can take advantage of the
            caching it will likely see a speedup as well.

            Windows (with TkpPutRGBAImage + cache):

            Diagonal:  - Opaque: resize-bench (diagonal): 52 steps in 6827.6ms
            (131.30ms/step)  - Transparent: resize-bench (diagonal): 52 steps in
            9053.8ms (174.11ms/step)

            Horizontal:  - Opaque: resize-bench (horizontal): 52 steps in 5495.4ms
            (105.68ms/step)  - Transparent: resize-bench (horizontal): 52 steps in
            7858.9ms (151.13ms/step)

            Vertical:  - Opaque: resize-bench (vertical): 42 steps in 3120.4ms
            (74.30ms/step)  - Transparent: resize-bench (vertical): 42 steps in
            4941.8ms (117.66ms/step)
  login:    mtmcp_

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