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User shares tip to speed up slow OpenAI Codex performance

A user on Reddit shared a workaround for slow performance with OpenAI's Codex, a code generation tool. The issue stemmed from Codex repeatedly running extensive test suites on the entire application, even for minor changes. The user found that by instructing Codex to perform only targeted tests on modified sections and to justify any additional testing, task completion times were drastically reduced from hours to minutes. AI

IMPACT Users can potentially improve the speed and efficiency of Codex by implementing targeted testing instructions.

RANK_REASON User-shared tip for improving performance of an existing AI tool.

Read on r/OpenAI →

AI-generated summary · Google Gemini · from 1 sources. How we write summaries →

User shares tip to speed up slow OpenAI Codex performance

How we ranked this

Signal score
4 / 100
Composite score across the factors below. Higher = stronger signal that this story matters right now.
Newsworthiness bucket
Tool
User-shared tip for improving performance of an existing AI tool.
Source corroboration
Single-source cluster
Only one publisher covered this so far. Single-source stories can still rank when the publisher is high-authority, but they lack cross-source corroboration.
Topics
product, other
Editorial topic classification. Feeds into how the story surfaces on /topic/<slug> hub pages and into the per-entity coverage mix.
AI-industry relevance
High
Clearly on-topic for AI-industry coverage.
Story freshness
Breaking (< 6h)
Fresh story with cross-source coverage still developing. Ranking may shift as more sources report.

Full methodology in our editorial standards.

COVERAGE [1]

  1. r/OpenAI TIER_2 English(EN) · /u/Some-Following-392 ·

    Why codex might be so slow for you

    <!-- SC_OFF --><div class="md"><p>So codex was taking longer and longer to do basic tasks. I paid attention to it and realised it was running a full test suite, multiple times, of the entire application i'm developing, even when I ask it to make a small change to one part of the …