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patches: fix O(position) performance via UAZoomEnabled caching

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Root cause (per Opus analysis): UAZoomEnabled() is a synchronous
Mach IPC roundtrip to macOS Accessibility server, called 3x per
redisplay cycle. At 60fps = 180 IPC roundtrips/second blocking the
main thread. Combined with Emacs's inherent O(position) redisplay
cost, this compounded into progressive choppy behavior.

Fix 1: ns_zoom_enabled_p() caches UAZoomEnabled() for 1 second.
Fix 2: ns_zoom_track_completion() rate-limited to 2 Hz.

Also includes BUF_CHARS_MODIFF fix (patch 0009) for VoiceOver cache.
This commit is contained in:
Daneel
2026-03-01 05:23:59 +01:00
parent cd16d45584
commit 6b3843e0c6
11 changed files with 137 additions and 20 deletions
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patches/0004-ns-add-interactive-span-elements-for-Tab-navigation.patch
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@@ -1,7 +1,7 @@
From 8c67a2b5a89ac302cbac91790fdfb6827b74285a Mon Sep 17 00:00:00 2001
From e04d6ef8808c1e00b37fca85e6ac0a7f6104bdb7 Mon Sep 17 00:00:00 2001
From: Martin Sukany <martin@sukany.cz>
Date: Sat, 28 Feb 2026 12:58:11 +0100
Subject: [PATCH 05/10] ns: add interactive span elements for Tab navigation
Subject: [PATCH 05/11] ns: add interactive span elements for Tab navigation
* src/nsterm.m (ns_ax_scan_interactive_spans): New function.
(EmacsAccessibilityInteractiveSpan): Implement AXButton/AXLink