{"version":"2.1.284","anchor":"headless-mode-records-prologue-and-sandbox-init-timings","canonical_anchor":"headless-mode-records-prologue-and-sandbox-init-timings","heading":"Non-interactive mode measures more of its startup time","tier":"internal","area":"Startup","url":"https:\/\/changelogs.core-directive.com\/v\/2.1.284\/e\/headless-mode-records-prologue-and-sandbox-init-timings","release_url":"https:\/\/changelogs.core-directive.com\/v\/2.1.284","markdown":"### Non-interactive mode measures more of its startup time\n\nWhen run without the interactive screen, Claude Code now times its early startup and how long setting up the sandbox takes\n\n**What**\n\nWhen Claude Code runs without its interactive screen, for example with `-p` or from a script, it now records two more timings: how long its early startup takes before loading the conversation, and how long the sandbox (the protected area commands run in) takes to set up. Nothing you see changes.\n\n**Why**\n\nThis is usage data only. It shows startup speed in this mode is being measured.\n\n- Area: Startup\n- Tier: Under the hood\n- Useful: 1\/5\n- Signal: 1\/5"}