[Bug] Significant Performance Regression in Claude Code Execution

Resolved 💬 3 comments Opened Sep 27, 2025 by sarkerg34 Closed Jan 9, 2026

Bug Description
Massive performance degradation. Task that would be one shot before are performing horribly today.

Environment Info

  • Platform: darwin
  • Terminal: cursor
  • Version: 1.0.126
  • Feedback ID: fefcfda1-5a80-475d-aacc-f7e089616d7a

Errors

[{"error":"AxiosError: Request failed with status code 401\n    at xN (file:///Users/gourab/.npm-global/lib/node_modules/@anthropic-ai/claude-code/cli.js:715:1077)\n    at IncomingMessage.I0 (file:///Users/gourab/.npm-global/lib/node_modules/@anthropic-ai/claude-code/cli.js:716:9955)\n    at IncomingMessage.emit (node:events:519:35)\n    at IncomingMessage.emit (node:domain:489:12)\n    at endReadableNT (node:internal/streams/readable:1696:12)\n    at process.processTicksAndRejections (node:internal/process/task_queues:90:21)\n    at pQ1.request (file:///Users/gourab/.npm-global/lib/node_modules/@anthropic-ai/claude-code/cli.js:718:2088)\n    at process.processTicksAndRejections (node:internal/process/task_queues:105:5)\n    at async _WA (file:///Users/gourab/.npm-global/lib/node_modules/@anthropic-ai/claude-code/cli.js:894:3751)","timestamp":"2025-09-27T00:10:12.946Z"},{"error":"Error: 1: 1 \n    at x56 (file:///Users/gourab/.npm-global/lib/node_modules/@anthropic-ai/claude-code/cli.js:1874:4091)\n    at async k56 (file:///Users/gourab/.npm-global/lib/node_modules/@anthropic-ai/claude-code/cli.js:1874:1656)","timestamp":"2025-09-27T00:10:14.456Z"},{"error":"SyntaxError: Unexpected token 'H', \"Here's a S\"... is not valid JSON\n    at JSON.parse (<anonymous>)\n    at file:///Users/gourab/.npm-global/lib/node_modules/@anthropic-ai/claude-code/cli.js:746:9932\n    at Q (file:///Users/gourab/.npm-global/lib/node_modules/@anthropic-ai/claude-code/cli.js:713:13288)\n    at bP2 (file:///Users/gourab/.npm-global/lib/node_modules/@anthropic-ai/claude-code/cli.js:1730:1777)\n    at process.processTicksAndRejections (node:internal/process/task_queues:105:5)","timestamp":"2025-09-27T00:41:24.463Z"},{"error":"Error: Request was aborted.\n    at Hu._createMessage (file:///Users/gourab/.npm-global/lib/node_modules/@anthropic-ai/claude-code/cli.js:1049:7952)\n    at process.processTicksAndRejections (node:internal/process/task_queues:105:5)","timestamp":"2025-09-27T01:09:30.279Z"},{"error":"Error: Tab close: Invalid tab not found!\n    at Zp2 (file:///Users/gourab/.npm-global/lib/node_modules/@anthropic-ai/claude-code/cli.js:1905:18493)\n    at process.processTicksAndRejections (node:internal/process/task_queues:105:5)\n    at async _VB (file:///Users/gourab/.npm-global/lib/node_modules/@anthropic-ai/claude-code/cli.js:3247:8496)\n    at async AbortSignal.I (file:///Users/gourab/.npm-global/lib/node_modules/@anthropic-ai/claude-code/cli.js:3247:7514)","timestamp":"2025-09-27T01:10:44.726Z"},{"error":"Error: Tab close: Invalid tab not found!\n    at Zp2 (file:///Users/gourab/.npm-global/lib/node_modules/@anthropic-ai/claude-code/cli.js:1905:18493)\n    at process.processTicksAndRejections (node:internal/process/task_queues:105:5)\n    at async _VB (file:///Users/gourab/.npm-global/lib/node_modules/@anthropic-ai/claude-code/cli.js:3247:8496)\n    at async AbortSignal.I (file:///Users/gourab/.npm-global/lib/node_modules/@anthropic-ai/claude-code/cli.js:3247:7514)","timestamp":"2025-09-27T01:11:31.312Z"},{"error":"Error: Request was aborted.\n    at JP.makeRequest (file:///Users/gourab/.npm-global/lib/node_modules/@anthropic-ai/claude-code/cli.js:1058:3864)\n    at process.processTicksAndRejections (node:internal/process/task_queues:105:5)","timestamp":"2025-09-27T01:11:49.376Z"},{"error":"Error: Tab close: Invalid tab not found!\n    at Zp2 (file:///Users/gourab/.npm-global/lib/node_modules/@anthropic-ai/claude-code/cli.js:1905:18493)\n    at process.processTicksAndRejections (node:internal/process/task_queues:105:5)\n    at async _VB (file:///Users/gourab/.npm-global/lib/node_modules/@anthropic-ai/claude-code/cli.js:3247:8496)\n    at async AbortSignal.I (file:///Users/gourab/.npm-global/lib/node_modules/@anthropic-ai/claude-code/cli.js:3247:7514)","timestamp":"2025-09-27T01:12:22.905Z"},{"error":"Error: Tab close: Invalid tab not found!\n    at Zp2 (file:///Users/gourab/.npm-global/lib/node_modules/@anthropic-ai/claude-code/cli.js:1905:18493)\n    at process.processTicksAndRejections (node:internal/process/task_queues:105:5)\n    at async _VB (file:///Users/gourab/.npm-global/lib/node_modules/@anthropic-ai/claude-code/cli.js:3247:8496)\n    at async AbortSignal.I (file:///Users/gourab/.npm-global/lib/node_modules/@anthropic-ai/claude-code/cli.js:3247:7514)","timestamp":"2025-09-27T01:13:41.131Z"},{"error":"Error: Tab close: Invalid tab not found!\n    at Zp2 (file:///Users/gourab/.npm-global/lib/node_modules/@anthropic-ai/claude-code/cli.js:1905:18493)\n    at process.processTicksAndRejections (node:internal/process/task_queues:105:5)\n    at async _VB (file:///Users/gourab/.npm-global/lib/node_modules/@anthropic-ai/claude-code/cli.js:3247:8496)\n    at async AbortSignal.I (file:///Users/gourab/.npm-global/l

Note: Error logs were truncated.

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