Summary
Qwen Code's nightly v0.15.10 update adds a performance improvement that bounds session-list metadata reads to the head and tail of files, uses pooled buffers, and lazily counts messages. The same nightly also includes e2e stabilization, wider built-in i18n coverage, and runtime session sidecar writing.
What changed
Qwen Code nightly v0.15.10 improved session-list metadata handling and bundled related CLI and telemetry updates.
Why it matters
Long-lived coding sessions are putting pressure on client-side performance and session management across the agent CLI market. This release shows Qwen spending engineering effort on the operating characteristics of the tool itself, not just model access or surface features.
Evidence excerpt
Qwen Code's release notes say v0.15.10 bounds session-list metadata reads to head and tail 64KB, uses a pooled buffer, and adds lazy message counting.