Malloc_trim - 标签 - William https://williamlfang.github.io/tags/malloc_trim/ Malloc_trim - 标签 | William Hugo -- gohugo.iozh-CNFri, 02 Oct 2026 22:30:00 +0900 tmux lag, round 2: every status-bar fork froze the server for 30 ms https://williamlfang.github.io/2026-10-02-tmux-lag-round-2/ Fri, 02 Oct 2026 22:30:00 +0900 william https://williamlfang.github.io/2026-10-02-tmux-lag-round-2/ Two days after the last fix, my tmux was laggy again, and the server was back at about a quarter of a CPU core. The culprit was the same as last time: the status bar’s #() jobs. This time, though, the number of jobs wasn’t the problem. Each one had become slow, because every job is a fork of the whole tmux server and my server had grown to 1.5 GB.

This post covers how I measured it, where the 1.5 GB came from (mostly the scrollback of three panes), and the fixes. One of them corrects a claim in my previous post.

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