Severe slowdown in org-table-recalculate with large tables (Org 9.7.11, Emacs 30.2)
19:28 20 Feb 2026

After upgrading to Emacs 30.2 (Org 9.7.11 bundled), recalculating large Org tables (~1500 rows) using `C-c C-c` has become significantly slower compared to previous versions (e.g., Org 9.5).

The slowdown occurs even for trivial formulas such as:

#+TBLFM: $3=$2

Editing and moving inside the table are fast. The delay only occurs when running `org-table-recalculate` via `C-c C-c`.

Recalculation should complete near-instantly (as in older Org versions).

Recalculation takes noticeable time (multiple seconds).

The slowdown occurs even for trivial column formulas without dependencies.

Some other notes:

- gc-cons-threshold: 50000000

- Behavior reproducible even in `emacs -Q`

- Editing individual cells is fast.

- Moving inside the table is fast.

- Only full-table recalculation via `C-c C-c` is slow.

- The issue does not appear to be GC-related.

org-mode org-table