GNU Emacs Manual. Node: Support Modes

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15.15: Font Lock Support Modes

Font Lock support modes make Font Lock mode faster for large buffers. There are two support modes: Fast Lock mode and Lazy Lock mode. They use two different methods of speeding up Font Lock mode.

  • Fast Lock Mode Saving font information in files.
  • Lazy Lock Mode Fontifying only text that is actually displayed.
  • Fast or Lazy Which support mode is best for you?
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