CLAUDE_CODE_COUNT_GARBAGE_COLLECTIONS

Updated October 31, 2026 by Alex Sorokoletov

CLAUDE_CODE_COUNT_GARBAGE_COLLECTIONS is a Claude Code environment variable: When set to 1 and remote mode is enabled, starts V8 garbage-collection profilers that count collections up to the first message and first result. Added in v2.1.311 and still present in v2.1.315. It is not in the official reference.

Status	Present in v2.1.315
Added	Added in v2.1.311
Category	Other
Official docs	Not listed

How to set it

For one session, export it in the shell that starts Claude Code:

export CLAUDE_CODE_COUNT_GARBAGE_COLLECTIONS=<value>
claude

To apply it to every session, add it to the env object of a settings file:

// ~/.claude/settings.json
{
  "env": {
    "CLAUDE_CODE_COUNT_GARBAGE_COLLECTIONS": "<value>"
  }
}

Related variables

GIT_CONFIG_COUNT
ANTHROPIC_BETAS: Comma-separated beta feature headers.
ANTHROPIC_CUSTOM_HEADERS: Custom HTTP headers (newline-separated Key: Value).
ANTHROPIC_FEDERATION_RULE_ID
ANTHROPIC_ORGANIZATION_ID
ANTHROPIC_WORKSPACE_ID
BETA_TRACING_ENDPOINT: Custom endpoint for beta tracing.
CLAUDE_AFK_COUNTDOWN_MS: Milliseconds before the away-from-keyboard timeout at which the warning countdown begins; defaults to 20000 and is capped at the timeout length.

Frequently asked questions

What does CLAUDE_CODE_COUNT_GARBAGE_COLLECTIONS do?

When set to 1 and remote mode is enabled, starts V8 garbage-collection profilers that count collections up to the first message and first result.

Which Claude Code version has CLAUDE_CODE_COUNT_GARBAGE_COLLECTIONS?

Added in v2.1.311 and still present in v2.1.315.

How do I set CLAUDE_CODE_COUNT_GARBAGE_COLLECTIONS?

Export it before starting Claude Code (export CLAUDE_CODE_COUNT_GARBAGE_COLLECTIONS=value), or add it to the "env" object in ~/.claude/settings.json to apply it to every session.

All variables, searchable: Claude Code environment variables.