**Async Logger** is a Minecraft mod that makes logging operations asynchronous.<\/p>\n
In vanilla, loggers are not asynchronous. This means the actual logging operations, including I\/O operations, happen on the logging thread. This mod changes logging to be asynchronous for better performance.<\/p>\n
This can be especially useful when large amounts of messages are being logged and\/or debug logging is enabled (default on Forge \/ NeoForge).<\/p>\n
## Benchmarks<\/p>\n
| Item | Vanilla | AsyncLogger |
\n|———————————-|———–|————-|
\n| Simple Messages (10k) | 6146.1ms | 141.2ms |
\n| Messages with Placeholders (10k) | 6413.2ms | 96.6ms |
\n| Messages with Throwable (1.5k) | 19572.4ms | 9.0ms |<\/p>\n
You can do these tests yourself by enabling `testPerformance` in the config. When this option is enabled, the mod will log a large number of messages both before and after setting up async loggers. You can see the test results in the log.<\/p>\n
## Technical Details<\/p>\n
– Asynchronous loggers are used, in favor of Asynchronous appenders. The former is newer, faster and lighter on allocation rate.
\n – Asynchronous loggers require LMAX Disruptor, a lock-free inter-thread communication library. The mod will load the library onto the system classloader when it is not present. This mod redistributes LMAX Disruptor under the Apache-2.0 License.
\n– The config file allows easy control of some log4j2 settings.
\n– `System.out` and `System.err` can be redirected to loggers.<\/p>\n","protected":false},"excerpt":{"rendered":"
Make loggers asynchronous for higher logging throughput and better performance<\/p>\n","protected":false},"featured_media":21670,"template":"","meta":{"_minecraft_slug":"asynclogger","_minecraft_project_id":"zvNzKfGF","_minecraft_author":"decce6","_minecraft_license":"LGPL-3.0-only","_minecraft_downloads":6091,"_minecraft_follows":16,"_minecraft_client_side":"required","_minecraft_server_side":"unsupported","_minecraft_storage_type":"zip","_minecraft_archive_name":"asynclogger.zip","_minecraft_size_bytes":15632733,"_minecraft_version_count":26,"_minecraft_updated_at":"2026-05-16T13:58:15.296481Z","_minecraft_date_created":"2026-05-02T23:46:28.373380Z","_minecraft_date_modified":"2026-05-15T06:46:25.717458Z","_minecraft_project_url":"https:\/\/modrinth.com\/mod\/asynclogger","_minecraft_icon_attachment_id":21670,"_minecraft_imported_at":"2026-05-31T21:37:13+00:00","_minecraft_import_hash":"47346ea1d9208811f77e23d055d013b9","_minecraft_versions":"","_minecraft_links":"","_minecraft_gallery":"","_minecraft_api_metadata":""},"mod_category":[97,104,158,90,98],"mod_loader":[99,106,160,100],"minecraft_version":[36,60,93,94,101,102,62,37,40,41,73,74,38,78,79,80,81,82,83,167,163],"class_list":["post-21669","mod","type-mod","status-publish","has-post-thumbnail","hentry","mod_category-fabric","mod_category-forge","mod_category-neoforge","mod_category-optimization","mod_category-quilt","mod_loader-fabric","mod_loader-forge","mod_loader-neoforge","mod_loader-quilt","minecraft_version-1-20-1","minecraft_version-1-20-2","minecraft_version-1-20-3","minecraft_version-1-20-4","minecraft_version-1-20-5","minecraft_version-1-20-6","minecraft_version-1-21","minecraft_version-1-21-1","minecraft_version-1-21-10","minecraft_version-1-21-11","minecraft_version-1-21-2","minecraft_version-1-21-3","minecraft_version-1-21-4","minecraft_version-1-21-5","minecraft_version-1-21-6","minecraft_version-1-21-7","minecraft_version-1-21-8","minecraft_version-1-21-9","minecraft_version-26-1","minecraft_version-26-1-1","minecraft_version-26-1-2"],"yoast_head":"\n