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The gauge broke: devs felt 20% faster with AI, measured 19% slower
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Overview
A controlled trial found that experienced developers felt about 20% faster while actually working 19% slower when using AI tools. AI increases typing speed but introduces overhead, prompting, waiting, and reviewing output, which can hinder productivity for experts in familiar codebases.
Summary from intrepidkarthi.com.
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Hacker News · intrepidkarthi.com
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Based on 5 sampled comments from this thread. Analyzed 2026-07-02.
- Praise: AI has significantly boosted productivity for certain repetitive tasks, allowing developers to focus on more complex and creative aspects of their work.
- Praise: The integration of AI tools has the potential to streamline mundane coding tasks, which can lead to faster project completion in the right contexts.
- Praise: AI's ability to gather context from various sources can enhance understanding and decision-making, making it a valuable tool for developers.
- Concern: The studies on AI's impact on productivity are flawed, as they fail to account for the variability in tasks and the changing nature of developer work.
- Concern: Many developers report that while AI can speed up certain tasks, it can also slow down others that require deep contextual knowledge and understanding.
- Concern: There is skepticism about the reliability of AI-generated code, with concerns that it may introduce errors and require extensive verification, negating perceived productivity gains.