DeveloperProductivity
Post #70 · source on Telegram
The Engineer's Definition of Efficiency
Description
The image shows a close-up of a printed page, likely from a textbook or workbook, with the heading 'REVIEW QUESTIONS'. Below the heading is the first question: '1. What is efficiency?'. Underneath the question, a handwritten answer in cursive pencil reads, 'clever laziness'. The image captures a core tenet of engineering and software development culture: the idea that true efficiency isn't about working harder, but about finding the smartest, often simplest, way to solve a problem with the least amount of effort. This 'clever laziness' is what drives automation, scripting, and the creation of reusable tools and abstractions - investing a little effort upfront to save a massive amount of repetitive work later
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A junior dev writes a script to save 5 minutes of daily work and it takes them 4 hours. A senior dev spends 4 hours writing a script to save 5 minutes of daily work, but now it's a configurable, idempotent, and fully-tested CLI tool that the whole team can use
Efficiency is burning two sprints writing a Kubernetes operator to eliminate a 5-minute weekly manual step - then calling the reclaimed time “strategic capacity planning.”
This is the same candidate who'll later argue that O(n!) is fine because "it works on my machine" and suggest blockchain for your caching layer
A senior engineer is just someone who spent two days automating a ten-minute task and called it 'efficiency' - and was right, three years later
This answer perfectly encapsulates Larry Wall's first virtue of great programmers: laziness - the quality that makes you write labor-saving programs rather than do the same task manually. After all, why spend 5 minutes doing something when you can spend 5 hours automating it so you never have to do it again? It's not procrastination, it's strategic efficiency optimization with a long-term ROI that definitely justifies the upfront investment... at least that's what we tell ourselves at 2 AM while writing a script to automate a task we'll only do twice
Efficiency is when you spend a day turning a weekly O(n) checklist into an O(1) Make target and quietly delete half the team’s toil budget
From lazy evaluation in Haskell to lazy loading in React - clever laziness powers every layer of the stack
Senior translation: apply amortized analysis to toil - spend a day scripting so the team pays O(1) per deploy instead of O(n) manual steps