1945310 - Testcase creating N event-listeners is 3x slower to create and delete the events. We are faster at "firing" the event.

Status: NEW

(Core :: DOM: Events, enhancement)

Description

[Mayank Bansal]

Attachment: event listeners.HTML

Open attached testcase
Enter 50k or 100k. Then successively create, fires, and delete the listeners.

50K

• Chrome: https://share.firefox.dev/3Eu5gZy (3.8s, 0.4s, 0.3s)
• Nightly: https://share.firefox.dev/4ho9rVG (10s, 0.3s, 1.1s)

100K

• Chrome: https://share.firefox.dev/3CAffMu (25s, 0.8s, 2.2s)
• Nightly: https://share.firefox.dev/42wY88W (60s, 0.6s, 10s

Testcase generated by ChatGPT on my prompt. The testcase is not realistic, but maybe the profiles highlight some hotspots?