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Practical tutorials for the work we actually do. Pick one, read it in order, and apply it.

Any category Programming24 Python 5 JavaScript 6 TypeScript 1 SQL 8 HTML and CSS 4 DevOps3 Docker 3
Any topics APIs and Integrations 12 Automation and Scripting 6 Data Structures and Algorithms 8 Databases 32 Deployment and Containers 36 Object-Oriented Programming 7 Packaging and Dependencies 17 Performance Optimization 27 Programming Basics 18 Programming Patterns 12 Security 8 Testing and Debugging 36 Type Systems 35 Web Development 38
Any level Beginner 1 Intermediate 2 Advanced 24
Performance Optimization Clear filters 27 results
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Cut Rebuild Time With a BuildKit Cache Mount

Add a BuildKit cache mount to pip install so a changed requirements file downloads only the new packages. After this, a dependency change no longer means downloading everything again.

4 min read
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Multi-Stage Node or Go Image Under 50 MB

Build a Go service in a multi-stage Dockerfile and ship it in an image well under 50 MB, with a non-root user and a health check. After this, you know why Go gets that small and Node does not.

4 min read
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Cap CPU and Memory So One Container Can't Starve the Host

Set CPU and memory limits, watch them work, change them on a running container and set them in Compose. After this, one busy container cannot take the whole machine.

4 min read