Event

<p><a href="https://www.mercurial-scm.org/">Mercurial</a> is a distributed version control system whose codebase combines Python, C and Rust. Over its twenty years of development, significant effort has been put into its scaling and overall performance.</p> <p>In the recent 7.2 version, the performance of exchanging data between repositories (e.g. <code>push</code> and <code>pull</code>) has been significantly improved, with some of our most complicated benchmark cases moving from almost four hours down to 2 minutes, a speedup of over 100x.</p> <p>This talk uses this work as a case study of the multiple places where performance improvements lie. It goes over the challenges that arise from exchanging data in a DVCS, and the levers we can pull to overcome them: higher level logic changes, lower level algorithmic improvements, programming language strengths, modern CPU architecture, network protocol design, etc.</p> <p>Despite the great results, exchanging data in version control remains a complex matter, and we lastly expose our ideas to further tackle its inherent complexity.</p>