org: Speeding up your agendas

 
 A.9 Speeding up your agendas
 ============================
 
 When your Org files grow in both number and size, agenda commands may
 start to become slow.  Below are some tips on how to speed up the agenda
 commands.
 
   1. Reduce the number of Org agenda files: this will reduce the
      slowness caused by accessing a hard drive.
   2. Reduce the number of DONE and archived headlines: this way the
      agenda does not need to skip them.
   3. Inhibit the dimming of blocked tasks:
           (setq org-agenda-dim-blocked-tasks nil)
   4. Inhibit agenda files startup options:
           (setq org-agenda-inhibit-startup nil)
   5. Disable tag inheritance in agenda:
           (setq org-agenda-use-tag-inheritance nil)
 
    You can set these options for specific agenda views only.  See the
 docstrings of these variables for details on why they affect the agenda
 generation, and this dedicated Worg page
 (http://orgmode.org/worg/agenda-optimization.html) for further
 explanations.