Core Performance Chat – July 28, 2026 – Speculative Loading and Environment Variables
Review PR #12514 to enable speculative loading via environment variable and evaluate Realtime Collaboration env var usage for hosting providers.
Merge PR #12514, test speculative loading settings, and adjust hosting environment variables for Realtime Collaboration.
Summary
The latest core performance chat discussed several pending performance‑related pull requests, including a new mechanism for hosting providers to control speculative loading eagerness and mode via an environment variable without requiring an mu‑plugin. @westonruter highlighted that WordPress already exposes an environment variable and constant for wp_get_environment_type, and that Realtime Collaboration configuration is also controlled through environment variables. The discussion also mentioned that performance‑lab plugin PRs are awaiting review and that hosts may need to adjust their PHP configuration to respect these new settings. The chat noted that the new PR #12514 will allow hosts to toggle speculative loading, and that the Realtime Collaboration environment variable can be used to enable or disable real‑time features. Reviewers are encouraged to examine the PRs and plan for hosting‑specific implementations. The next performance chat will take place on July 28, 2026, to continue the discussion.
Key changes
- PR #12514 introduces environment variable to control speculative loading eagerness and mode.
- WordPress exposes environment variable and constant for wp_get_environment_type.
- Realtime Collaboration configuration is also controlled via environment variables.
- Performance‑lab plugin PRs pending review.
- Hosts may need to adjust PHP configuration to respect new settings.
- Next performance chat scheduled for July 28, 2026.