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Only execute events since most recent pageload when playing from an offset (#200)

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On recordings with many full pageloads, dom state and mutations were being applied only to be discarded when a new pageload came in, resulting in very slow time to rebuild - and inability to interactively 'scrub' through these recordings
This commit is contained in:
Eoghan Murray
2026-04-01 12:00:00 +08:00
committed by GitHub
parent 753ee25832
commit c19aaa7ec0
1 changed files with 16 additions and 1 deletions
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17
src/replay/machine.ts
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@@ -4,6 +4,7 @@ import {
eventWithTime,
actionWithDelay,
ReplayerEvents,
EventType,
Emitter,
} from '../types';
import { Timer, getDelay } from './timer';
@@ -169,8 +170,22 @@ export function createPlayerService(
play(ctx) {
const { timer, events, baselineTime, lastPlayedEvent } = ctx;
timer.clear();
const actions = new Array<actionWithDelay>();
const needed_events = new Array<eventWithTime>();
for (const event of events) {
if (event.timestamp < baselineTime &&
event.type === EventType.FullSnapshot &&
needed_events.length > 0 &&
needed_events[needed_events.length -1].type === EventType.Meta
) {
// delete everything before Meta
// so that we only rebuild from the latest full snapshot
needed_events.splice(0, needed_events.length -1);
}
needed_events.push(event);
}
const actions = new Array<actionWithDelay>();
for (const event of needed_events) {
if (
lastPlayedEvent &&
(event.timestamp <= lastPlayedEvent.timestamp ||