Why Long-Lived Branches Are Killing Your Velocity
If your team spends more time resolving merge conflicts than writing features, you have a branching problem. Long-lived branches—those lasting weeks or even months—create integration nightmares. The longer a branch lives, the further it drifts from the main codebase.
According to the DORA State of DevOps Report, elite-performing teams deploy multiple times per day. Their secret? They rarely let branches live longer than 24 hours.
What Is Trunk-Based Development?
Trunk-based development (TBD) is a source-control strategy where developers integrate their work into a single shared branch—the “trunk” or “main”—frequently. Instead of maintaining parallel branches for weeks, developers either:
- Commit directly to trunk (small teams)
- Use short-lived feature branches that merge within 1-2 days (larger teams)
The goal is simple: keep everyone’s code as close to production as possible, at all times.
How It Differs from Gitflow
| Aspect | Gitflow | Trunk-Based Development |
|---|---|---|
| Branch lifespan | Weeks to months | Hours to 1-2 days |
| Merge frequency | At release milestones | Multiple times daily |
| Merge conflicts | Frequent, complex | Rare, trivial |
| Deploy frequency | Weekly/monthly | Daily or on-demand |
| Team coordination | High overhead | Low overhead |
The Real Benefits: Numbers That Matter
Teams adopting trunk-based development consistently report:
- 90% fewer merge conflicts due to continuous integration
- 2-3x higher deployment frequency compared to branch-heavy workflows
- 50% shorter lead time from commit to production
- Lower change failure rates, because smaller changes are easier to test and roll back
Google operates on a single monorepo with 25,000+ engineers committing to trunk. If it scales there, it scales for your team.
Making It Work: Practical Strategies
Feature Flags Over Feature Branches
Instead of isolating incomplete work in a branch, deploy it behind a feature flag. This lets you:
- Merge incomplete code safely
- Test in production with controlled rollouts
- Toggle features on/off without redeployment
Invest in CI/CD Pipelines
Trunk-based development demands robust automated testing. Every commit to trunk should trigger:
- Unit tests
- Integration tests
- Linting and static analysis
- Automated deployment to staging
Without this safety net, committing to trunk frequently becomes reckless rather than agile.
Small, Incremental Commits
The golden rule: if your pull request takes more than 15 minutes to review, it is too big. Break work into slices that can be reviewed, tested, and merged within hours.
At Lueur Externe, where we manage complex e-commerce and web projects for clients across the Alpes-Maritimes and beyond, trunk-based development is central to our delivery pipeline. It allows our certified Prestashop and WordPress teams to ship updates faster while maintaining production stability.
When Trunk-Based Development Is Not the Right Fit
TBD works best when:
- Your team has solid test coverage (ideally 70%+)
- CI/CD infrastructure is in place
- Developers are comfortable with small, frequent commits
If your team lacks automated testing or deploys manually, start by building that foundation first.
Conclusion: Stop Branching, Start Shipping
Long-lived branches are a symptom of fear—fear of breaking things, fear of incomplete code reaching production. Trunk-based development addresses that fear with better tools: feature flags, automated testing, and continuous integration.
The result? Faster releases, fewer conflicts, and happier developers.
If you are ready to modernize your development workflow and accelerate your delivery pipeline, the team at Lueur Externe can help you implement trunk-based development, CI/CD automation, and scalable infrastructure. Get in touch today to discuss your project.