Overview
The article discusses Pinterest's efforts to develop fast and reliable iOS builds by optimizing their build process and adopting Bazel as their primary build tool. It highlights the significant improvements in build times and reliability achieved through this transition.
What You'll Learn
1
How to optimize iOS build processes using Bazel
2
Why consistent build environments are crucial for development
3
When to implement incremental builds for efficiency
Prerequisites & Requirements
- Understanding of iOS development and build processes
- Familiarity with Bazel and Xcode(optional)
Key Questions Answered
What improvements were achieved by using Bazel for iOS builds?
By adopting Bazel, Pinterest reduced clean build times from 4 minutes 38 seconds to 3 minutes 38 seconds, achieving a 21% improvement. They also reported faster incremental builds, with some taking as little as 30 seconds due to remote caching, and an increase in build success rates from around 80% to 97%-100%.
How does Bazel improve the reliability of builds?
Bazel ensures reproducible builds by maintaining consistent environments across local and continuous integration settings. This eliminates variability and allows developers to reproduce build issues easily, leading to more reliable software releases.
What challenges did Pinterest face with their previous build systems?
Pinterest encountered issues with build instability, long build times, and difficulties in managing dependencies across different environments. These challenges were exacerbated by the complexity of their modular architecture and the need for consistent tooling across various programming languages.
Key Statistics & Figures
Clean build time reduction
1 minute
Reduced from 4 minutes 38 seconds to 3 minutes 38 seconds, representing a 21% improvement.
Incremental build time
30 seconds
Builds can now be completed in as little as 30 seconds due to remote caching.
Build success rate improvement
97%-100%
Increased from around 80% to a near-perfect success rate with Bazel.
Technologies & Tools
Build Tool
Bazel
Used for managing and optimizing the build process for iOS applications.
IDE
Xcode
Previously used for building iOS applications before transitioning to Bazel.
Key Actionable Insights
1Implementing Bazel can significantly reduce build times, enhancing developer productivity.By transitioning to Bazel, Pinterest achieved a 21% reduction in clean build times, which allows developers to spend more time on feature development rather than waiting for builds to complete.
2Maintaining a consistent build environment is crucial for reducing errors and improving reliability.A consistent environment ensures that builds behave the same way regardless of where they are executed, which is essential for collaborative development and continuous integration.
3Utilizing remote caching can drastically improve build efficiency.With remote caching, builds can be reused across different machines, reducing build times to as little as 30 seconds, which is particularly beneficial in large teams.
Common Pitfalls
1
Failing to maintain a consistent build environment can lead to unpredictable build failures.
Inconsistent environments can cause builds to succeed on a developer's machine but fail in continuous integration, leading to wasted time and frustration.
2
Neglecting to optimize build processes can result in significant delays in development.
Long build times can bottleneck development, making it essential to adopt tools and practices that streamline the build process.
Related Concepts
Continuous Integration
Modular Architecture
Build Optimization Techniques