Analyzing Disk I/O Bottlenecks in GitHub CI Pipelines

2025-03-28
Analyzing Disk I/O Bottlenecks in GitHub CI Pipelines

This article investigates often-overlooked disk I/O bottlenecks in GitHub CI pipelines. Using tools like iostat and fio, the author monitors and tests disk performance across different runners, discovering bandwidth limitations on the default ubuntu-22.04 runner that hinder dependency installation. The analysis delves into the impact of cache download, extraction, and numerous small file writes on disk I/O. The article recommends using fio for benchmarking and comparing runner disk performance, ultimately highlighting Depot's upcoming Ultra Runner, promising significant improvements in disk I/O performance.

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Development Disk I/O

Depot Registry: A Faster, More Powerful Docker Registry is Here

2025-03-05
Depot Registry: A Faster, More Powerful Docker Registry is Here

Depot has launched Depot Registry, a faster and more powerful Docker registry. Built upon learnings from their internal ephemeral registry, it offers a globally distributed architecture seamlessly integrating with Depot builds. Key improvements include enhanced performance via Tigris' global content delivery and S3 integration; a new registry dashboard for image management; customizable image retention policies; and automatic integration with Depot GitHub Actions runners, simplifying authentication. Depot Registry is now generally available, included in all plans with storage charges only.

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Development