Pango optimization work

Remaining problems

• Fix caching of rendered glyphs in Cairo or Fontconfig so that CJK does not suck: Federico's benchmark

• Benchmark rendering (so far we have only benchmarked text layout)

• Make pango_default_break() faster: 123646. Assigned: Billy and Behdad

• Benchmark non-default layouts (with a fixed width, with ellipsization, with markup...)

Solved problems

• Update mini-Fribidi: 317192

• Use a cache on each PangoCairoFcFont to map gunichars to glyphs: 320665

• Use a fast search table to map gunichars to scripts: 320666

• Make pango_log2vis_get_embedding_levels() fast for LTR-only or RTL-only strings. 315365

Things that were not problems after all:

• Make g_utf8_next_char() faster: 320519

Useful tool: Cairo trace utility

• http://cairographics.org/FAQ/#profiling

• Carl D. Wort blog entry