Git & Version Control

A Deep Dive into Git Performance using Trace2

August 6, 2019 Aug 6, 2019 08/6/19

Jeff Hostetler

A deep dive into using the new Git Trace2 feature to study Git performance problems on very large repos.

Improving Azure DevOps cherry-picking

June 6, 2019 Jun 6, 2019 06/6/19

Begona Guereca

One of the more powerful git commands is the cherry-pick command. This can be an extremely powerful component of many git workflows such as the Azure DevOps team's Release Flow. To highlight a common use-case for it, let’s talk about hot-fixing release branches.

Exploring new frontiers for Git push performance

May 15, 2019 May 15, 2019 05/15/19

Derrick Stolee

In previous posts I've talked about performance improvements that our team contributed to the Git community. At Microsoft, we've been pushing Git to its limits with the largest and busiest Git repositories on the planet, improving core Git as we go and sending these improvements back upstream. With Git 2.21.0 and later you can take advantage ...

Remediating the October 2018 Git Security Vulnerability

October 5, 2018 Oct 5, 2018 10/5/18

Edward Thomson

Today, the Git project has announced a security vulnerability: there is a security issue in recursively cloning submodules that can lead to arbitrary code execution. The Azure DevOps team encourages you to examine whether you are on an affected platform and, if so, upgrade your Git clients to the latest version.

Supercharging the Git Commit Graph IV: Bloom Filters

July 16, 2018 Jul 16, 2018 07/16/18

Derrick Stolee

We've been discussing the commit-graph feature in Git 2.18 and how we can use generation numbers to accelerate commit walks. One area where we can get significant speedup is when presenting output in topological order. This allows us to walk a much smaller list of commits than before. One place where this breaks down is when we apply a filter ...

Supercharging the Git Commit Graph III: Generations and Graph Algorithms

July 9, 2018 Jul 9, 2018 07/9/18

Derrick Stolee

Earlier, we announced that Git 2.18 contains a new commit-graph feature, and we discussed the commit-graph file format. As shipped in Git 2.18, this file only speeds up commit walks by a constant multiple, due to parsing structured data from the commit-graph file. Today, we continue by talking about how we can use the idea of a generation ...

Supercharging the Git Commit Graph II: File Format

July 2, 2018 Jul 2, 2018 07/2/18

Derrick Stolee

Earlier, we announced the commit-graph feature in Git 2.18 and talked about some of its performance benefits. Today, we'll discuss some if the technical details about how the commit-graph feature works, including some helpful properties of its file format. This file speeds up commit-graph walks so much that we were able to identify other ways ...

Supercharging the Git Commit Graph

June 25, 2018 Jun 25, 2018 06/25/18

Derrick Stolee

Have you ever run gitk and waited a few seconds before the window appears? Have you struggled to visualize your commit history into a sane order of contributions instead of a stream of parallel work? Have you ever run a force-push and waited seconds for Git to give any output? You may be having performance issues due to the number of commits ...

New Navigation for Visual Studio Team Services

June 19, 2018 Jun 19, 2018 06/19/18

Jeremy Epling

I’m excited to share the new navigation we’re working on for Visual Studio Team Services (VSTS) to modernize the user experience and give you more flexibility. As Lori mentioned in her blog post, our goal to create an integrated suite that also gives the flexibly to pick and choose the services that work best for you. That goal is...

Shift Left with SonarCloud Pull Request Integration

May 10, 2018 May 10, 2018 05/10/18

Matthew Mitrik (MS)

One of our DevOps "habits" is to Shift Left and move quality upstream. Including additional validations earlier in the DevOps pipeline means identifying potential issues before they become a problem. For teams using pull requests, catching issues while the PR is active is ideal - the code hasn't been merged yet, so it's easy to respond to ...

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