diff options
Diffstat (limited to 'TODO')
| -rw-r--r-- | TODO | 26 |
1 files changed, 18 insertions, 8 deletions
@@ -1,3 +1,21 @@ +Aha! I knew there had to be a way. The old keyboard shortcutting +code (which uses chess-legal-plies) was just way to slow. On modern +machines you couldn't notice it, but on my 300 MHz laptop in battery +save mode, even with the byte-compiled files, I spent 1/4 of my time +looking at the hourglass cursor. So I kept chewing on the algorithm, +dropping the number of calls to chess-search-position (the biggest and +slowest function in all of chess.el) from 5400 calls down to 4300 +calls. But still it was slow. Then I thought about it long and hard, +and realized chess-legal-plies was going about its whole job +backwards. Since that function is only used by keyboard shortcutting, +I found a way to optimize it for that task, while keeping it as +general as before (by adding a "piece-or-color" argument). The net +result is that I got the number of calls to chess-search-position down +to 797!! That's 5000 calls less. It dropped the number of uses of +`chess-incr-index' by 20,000. The new code is so fast I that when +it's byte-compiled, I never see an hourglass cursor, even on my +laptop. + - Feature work remaining: annotations @@ -9,14 +27,6 @@ ---------------------------------------------------------------------- -- modify displays and engines so they ONLY keep game objects; thus - set-start-position would become just set-position - -- distinguish between chess-display-set-game and - chess-display-set-game*. The latter detaches and sets a new game - object. The former just overwrites the current game object. - - - undo is not working with gnuchess |