Media pager: a flick flies from an ordinary brisk swipe, and further. A flight took a hard fling (3 px/ms, coasting 500 ms) — Adam, 2026-10-16: "too hard to get it to fly". Now from 1.6 px/ms, coasting 800 ms (so a brisk swipe is two posts, a hard flick five or six), and the finger's speed is its average over its last 80 ms rather than its last five samples — at a phone's 120 Hz those were a third of that, and the finger slowing as it lifts hid the flick. tools/pager-swipe-fly-test.js: the quick flick is three big moves on a schedule from the start (a move's handling in a headless browser takes 30–50 ms, so a paced flick came out a stroll), flying three to six posts; a 320px swipe over 130ms is still one post; pager-tap-slop and profile-pager tests pass.

Co-Authored-By: Claude Fable 5.1 <[email protected]>
Claude-Session: https://claude.ai/code/session_01J1Kon8bxJoHRpJdSzshCkp

1 files changed, 5 insertions, 2 deletions

diff --git a/src/features/messages.js b/src/features/messages.js
index 4a154c8..7e92374 100644
--- a/src/features/messages.js
+++ b/src/features/messages.js
@@ -12763,7 +12763,10 @@ export function messagesFeature(ctx) {
     // fling would have coasted — the speed times FLY_TAU, in screens — from
     // FLY_V up; a slower swipe is the one post it was. The ends are not
     // flown past: a fling that would, lands on the last (or first) post.
-    const FLY_V = 3, FLY_TAU = 500, FLY_MAX = 6; // px/ms; ms; posts
+    // (3 px/ms and a 500 ms coast took a hard flick to fly at all — Adam,
+    // 2026-10-16: "too hard to get it to fly".)
+    const FLY_V = 1.6, FLY_TAU = 800, FLY_MAX = 6; // px/ms; ms; posts
+    const TRACK_MS = 80; // the speed is the finger's over its last moment, not its last few samples
     let touch = null, pendingTap = 0, tapDoneAt = 0;
     el.addEventListener('touchstart', (e) => {
       const t = e.touches[0];
@@ -12791,7 +12794,7 @@ export function messagesFeature(ctx) {
       d.far = Math.max(d.far || 0, Math.hypot(dx, dy));
       if (d.axis === 'y') d.box.scrollTop = d.start - delta; else d.box.scrollLeft = d.start - delta;
       d.track.push({ t: performance.now(), v: delta }); // (when handled: synthetic moves can share a timeStamp)
-      if (d.track.length > 5) d.track.shift();
+      while (d.track.length > 2 && d.track[d.track.length - 1].t - d.track[1].t >= TRACK_MS) d.track.shift();
     }, { passive: false });
     // let go of a drag: on to the next (or the one before), or back
     function settle(d, step, vel = 0) {