Article Summary (Model: gpt-5.2)
Subject: Cowork’s hidden VM bloat
The Gist:
A GitHub issue reports that enabling Anthropic’s “Cowork” feature in Claude Desktop on macOS creates a large Linux VM bundle (notably a rootfs.img that grows to ~10GB) and that Claude Desktop performance becomes increasingly sluggish (slow startup/UI lag, high idle CPU, swap growth). Manually deleting the VM bundle and caches yields an immediate ~75% speedup, but performance still degrades again within minutes, suggesting an additional leak/accumulating workload beyond just disk usage.
Key Claims/Facts:
- 10GB VM bundle: Cowork creates
~/Library/Application Support/Claude/vm_bundles/claudevm.bundle/rootfs.img, which grows to ~10GB and regenerates after deletion. - Cleanup helps but isn’t a fix: Deleting
vm_bundles,Cache, andCode Cacheimproves performance substantially at first (~75%). - Ongoing degradation: CPU at idle rises over time (reported ~24% → ~55%), swapins increase, implying memory leak/accumulating work even when the VM bundle is empty.
Discussion Summary (Model: gpt-5.2)
Consensus: Skeptical—people understand the security rationale for a VM sandbox, but are unhappy with the surprise disk/power/perf costs and lack of user control.
Top Critiques & Pushback:
Better Alternatives / Prior Art:
Expert Context: