InstantXP

The error that broke the Mending enchantment has been fixed (version 1.0.0 of the mod containing that bug has been removed; the issue was resolved in version 1.0.1 of the mod).

This small quality-of-life mod makes experience absorption nearly instant, while still preserving part of the XP orb animation. It significantly reduces the delay when absorbing experience orbs.

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This table provides an estimate of the time required to absorb experience orbs in a controlled scenario (a test world available for download from game version 1.21.1).

XP Level	MC vanilla	InstantXP	Diff	Reduction
Level 5	00:00	00:00	00:00	0%
Level 10	00:01	00:00	-00:01	100%
Level 15	00:02	00:01	-00:01	50%
Level 20	00:03	00:01	-00:02	67%
Level 25	00:05	00:02	-00:03	60%
Level 30	00:09	00:03	-00:06	67%
Level 35	00:13	00:05	-00:08	62%
Level 40	00:18	00:08	-00:10	56%
Level 45	00:24	00:11	-00:13	54%
Level 50	00:30	00:14	-00:16	53%
Level 55	00:38	00:19	-00:19	50%
Level 60	00:48	00:24	-00:24	50%
Level 65	00:57	00:30	-00:27	47%
Level 70	01:08	00:36	-00:32	47%
Level 75	01:21	00:42	-00:39	48%
Level 80	01:35	00:50	-00:45	47%
Level 85	01:49	00:58	-00:51	47%
Level 90	02:04	01:07	-00:57	46%
Level 95	02:21	01:16	-01:05	46%
Level 100	02:40	01:26	-01:14	46%
Level 105	03:00	01:36	-01:24	47%
Level 110	03:20	01:46	-01:34	47%
Level 115	03:40	01:58	-01:42	46%
Level 120	04:04	02:10	-01:54	47%
Level 125	04:29	02:23	-02:06	47%
Level 130	04:55	02:37	-02:18	47%
Level 135	05:21	02:52	-02:29	46%
Level 140	05:49	03:07	-02:42	47%
Level 145	06:18	03:23	-02:55	46%
Level 150	06:50	03:39	-03:11	47%
Level 155	07:21	03:55	-03:26	47%
Level 160	07:51	04:13	-03:38	46%
Level 165	08:24	04:30	-03:54	46%
Level 170	08:58	04:49	-04:09	46%
Level 175	09:31	05:08	-04:23	46%
Level 180	10:05	05:27	-04:38	46%
Level 185	10:40	05:47	-04:53	46%
Level 190	11:18	06:08	-05:10	46%
Level 195	11:59	06:29	-05:30	46%
Level 200	12:38	06:51	-05:47	46%
Level 205	13:17	07:14	-06:03	46%
Level 210	14:02	07:37	-06:25	46%
Level 215	14:49	08:00	-06:49	46%
Level 220	15:32	08:25	-07:07	46%
Level 225	16:16	08:51	-07:25	46%
Level 230	17:03	09:17	-07:46	46%
Level 235	17:49	09:43	-08:06	45%
Level 240	18:37	10:10	-08:27	45%
Level 245	19:26	10:38	-08:48	45%
Level 250	20:16	11:07	-09:09	45%
Level 255	21:08	11:35	-09:33	45%
Level 260	22:04	12:06	-09:58	45%
Level 265	22:59	12:37	-10:22	45%
Level 270	23:53	13:08	-10:45	45%
Level 275	24:49	13:40	-11:09	45%
Level 280	25:45	14:12	-11:33	45%
Level 285	26:46	14:45	-12:01	45%
Level 290	27:44	15:19	-12:25	45%
Level 295	28:44	15:53	-12:51	45%
Level 300	29:45	16:28	-13:17	45%

WARNING

It hasn’t been tested on multiplayer servers, but in principle it should work correctly when installed on the local client.

CAUTION

Additionally, this mod could be considered cheating on some servers, so you should ask moderators to avoid any issues.