"After completing the study, developers estimate that allowing AI reduced completion time by 20 percent. Surprisingly, we find that allowing AI actually increases completion time by 19 percent - AI tooling slowed developers down."
"The study involved 16 experienced developers who work on large, open source projects. The developers provided a list of real issues (e.g. bug fixes, new features, etc.) they needed to address - 246 in total - and then forecast how long they expected those tasks would take."
Researchers tested AI coding tools in a randomized trial involving 16 experienced developers. The study found that these tools increased software completion time by 19 percent. Despite developers predicting a 24 percent speedup, they later estimated a 20 percent reduction in completion time. Contributing factors to the slowdown included developer over-optimism regarding AI capabilities and their high familiarity with the code repositories, which minimized the perceived benefits of AI assistance.
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