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note on speed increase

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Howland Owl 2013-10-07 20:10:43 +03:00
parent 956748c90b
commit 4b0ea34fe0
1 changed files with 1 additions and 6 deletions
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7
textmode.coffee
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@ -980,6 +980,7 @@ class @ImageTextMode
@font = new ImageTextModeFont( { chars: chars, height: height } ) @font = new ImageTextModeFont( { chars: chars, height: height } )
# the majority of time is spent in this routine # the majority of time is spent in this routine
# list comprehension seems to speed up from 1.8 seconds to 1.29 seconds from first comprehension / cleanup?
renderCanvas: ( canvasElem ) -> renderCanvas: ( canvasElem ) ->
w = @getWidth() * @font.width w = @getWidth() * @font.width
@ -1013,12 +1014,6 @@ class @ImageTextMode
chr = @font.chars[ pixel.ch.charCodeAt( 0 ) & 0xff ] chr = @font.chars[ pixel.ch.charCodeAt( 0 ) & 0xff ]
i = 0 i = 0
for line in chr for line in chr
# [ 0 ... @font.height ]
# line = chr[ i ]
# for j in [ 0 ... @font.width ]
# if line & ( 1 << @font.width - 1 - j )
# ctx.fillRect px + j, py + i, 1, 1
ctx.fillRect px + j, py + i, 1, 1 for j in [ 0 ... @font.width ] when line & (1 << @font.width - 1 - j ) ctx.fillRect px + j, py + i, 1, 1 for j in [ 0 ... @font.width ] when line & (1 << @font.width - 1 - j )
i += 1 i += 1