Cache the viewport to make invalidation faster#6918
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Huh. We were caching it, but not using the cached value? Classic us.
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Carlos Zamora (1) * UIA: use full buffer comparison in rects and endpoint setter (GH-6447) Dan Thompson (2) * Tweaks: normalize TextAttribute method names (adjective form) (GH-6951) * Fix 'bcz exclusive' typo (GH-6938) Dustin L. Howett (4) * Fix VT mouse capture issues in Terminal and conhost (GH-7166) * version: bump to 1.3 on master * Update Cascadia Code to 2007.15 (GH-6958) * Move to the TerminalDependencies NuGet feed (GH-6954) James Holderness (3) * Render the SGR "underlined" attribute in the style of the font (CC-7148) * Add support for the "crossed-out" graphic rendition attribute (CC-7143) * Refactor grid line renderers with support for more line types (CC-7107) Leonard Hecker (1) * Added til::spsc, a lock-free, single-producer/-consumer FIFO queue (CC-6751) Michael Niksa (6) * Update TAEF to 10.57.200731005-develop (GH-7164) * Skip DX invalidation if we've already scrolled an entire screen worth of height (GH-6922) * Commit attr runs less frequently by accumulating length of color run (GH-6919) * Set memory order on slow atomics (GH-6920) * Cache the viewport to make invalidation faster (GH-6918) * Correct comment in this SPSC test as a quick follow up to merge. Related work items: MSFT-28208358
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In
Renderer::TriggerRedraw, the act of fetching the viewport from thepDataover and over is wasted time. We already have a cached variableof the viewport that is updated on every scroll check (on
TriggerScrolland onPaintFrame.) Scrolling wouldn't be workingcorrectly if the clients weren't already notifying us that the viewport
has changed for scroll purposes, so we can just keep using that cached
value for the invalidation restriction to speed things up over fetching
it again.
Validation Steps Performed
time cat big.txt. Checked average time before/after, WPR tracesbefore/after.
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