Show HN: Qlog – grep for logs, but 100x faster

I built qlog because I got tired of waiting for grep to search through gigabytes of logs.

qlog uses an inverted index (like search engines) to search millions of log lines in milliseconds. It's 10-100x faster than grep and way simpler than setting up Elasticsearch.

Features: - Lightning fast indexing (1M+ lines/sec using mmap) - Sub-millisecond searches on indexed data - Beautiful terminal output with context lines - Auto-detects JSON, syslog, nginx, apache formats - Zero configuration - Works offline - Pure Python

Example: qlog index './logs/*/*.log' qlog search "error" --context 3

I've tested it on 10GB of logs and it's consistently 3750x faster than grep. The index is stored locally so repeated searches are instant.

Demo: Run `bash examples/demo.sh` to see it in action.

GitHub: https://github.com/Cosm00/qlog

Perfect for developers/DevOps folks who search logs daily.

Happy to answer questions!

17 points cosm00 8 months ago 20 comments

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