JavaFx: Rendering 500k rectangles is very slow the 1.time, but fast afterwards. Why?
I am using JavaFx and Canvas to render a map as 500k colored rectangles. The 1.time I render them, it takes around 40 seconds, but later less than 1 second:
1.Time:
10:11:17:133 INFO jfws.util.map.MapRenderer - render()
10:11:54:469 INFO jfws.editor.map.MapEditorController - render(): Finished
Later:
10:40:23:905 INFO jfws.util.map.MapRenderer - render()
10:40:23:989 INFO jfws.editor.map.MapEditorController - render(): Finished
The code contains 2 loops with 2 commands per rectangle:
graphicsContext.setFill(color);
graphicsContext.fillRect(x, y, width, height);
See MapRenderer.java.
I am also rendering a small map with 200 rectangles many times before that without any problems.
java javafx 2d rendering
asked Nov 24 '18 at 10:09
OrchaldirOrchaldir
116
add a comment |
I am using JavaFx and Canvas to render a map as 500k colored rectangles. The 1.time I render them, it takes around 40 seconds, but later less than 1 second:
1.Time:
10:11:17:133 INFO jfws.util.map.MapRenderer - render()
10:11:54:469 INFO jfws.editor.map.MapEditorController - render(): Finished
Later:
10:40:23:905 INFO jfws.util.map.MapRenderer - render()
10:40:23:989 INFO jfws.editor.map.MapEditorController - render(): Finished
The code contains 2 loops with 2 commands per rectangle:
graphicsContext.setFill(color);
graphicsContext.fillRect(x, y, width, height);
See MapRenderer.java.
I am also rendering a small map with 200 rectangles many times before that without any problems.
java javafx 2d rendering
asked Nov 24 '18 at 10:09
OrchaldirOrchaldir
116
it's due to the cache. When you open something, you load many abojet, but when you close it, some data stay il your computer to load faster.
– charles Lgn
Nov 24 '18 at 10:26
Even if I modify part of the map (~5k rectangles), it still renders the whole 500k in less than a second.
– Orchaldir
Nov 24 '18 at 10:32
What hapen if thé first tome you load 1 rectangle ?
– charles Lgn
Nov 24 '18 at 10:33
An loading a different map, which changes the color of every rectangle is equally fast.
– Orchaldir
Nov 24 '18 at 10:34
The application starts with rendering a map with 200 rectangles. That happens very fast. Later it switches to the larger map and it slows down the 1.time rendering it.
– Orchaldir
Nov 24 '18 at 10:41
add a comment |
I am using JavaFx and Canvas to render a map as 500k colored rectangles. The 1.time I render them, it takes around 40 seconds, but later less than 1 second:
1.Time:
10:11:17:133 INFO jfws.util.map.MapRenderer - render()
10:11:54:469 INFO jfws.editor.map.MapEditorController - render(): Finished
Later:
10:40:23:905 INFO jfws.util.map.MapRenderer - render()
10:40:23:989 INFO jfws.editor.map.MapEditorController - render(): Finished
The code contains 2 loops with 2 commands per rectangle:
graphicsContext.setFill(color);
graphicsContext.fillRect(x, y, width, height);
See MapRenderer.java.
I am also rendering a small map with 200 rectangles many times before that without any problems.
java javafx 2d rendering
asked Nov 24 '18 at 10:09
OrchaldirOrchaldir
116
I am using JavaFx and Canvas to render a map as 500k colored rectangles. The 1.time I render them, it takes around 40 seconds, but later less than 1 second:
1.Time:
10:11:17:133 INFO jfws.util.map.MapRenderer - render()
10:11:54:469 INFO jfws.editor.map.MapEditorController - render(): Finished
Later:
10:40:23:905 INFO jfws.util.map.MapRenderer - render()
10:40:23:989 INFO jfws.editor.map.MapEditorController - render(): Finished
The code contains 2 loops with 2 commands per rectangle:
graphicsContext.setFill(color);
graphicsContext.fillRect(x, y, width, height);
See MapRenderer.java.
I am also rendering a small map with 200 rectangles many times before that without any problems.
java javafx 2d rendering
java javafx 2d rendering
asked Nov 24 '18 at 10:09
OrchaldirOrchaldir
116
asked Nov 24 '18 at 10:09
OrchaldirOrchaldir
116
asked Nov 24 '18 at 10:09
OrchaldirOrchaldir
116
asked Nov 24 '18 at 10:09
OrchaldirOrchaldir
116
asked Nov 24 '18 at 10:09
OrchaldirOrchaldir
116
116
it's due to the cache. When you open something, you load many abojet, but when you close it, some data stay il your computer to load faster.
– charles Lgn
Nov 24 '18 at 10:26
Even if I modify part of the map (~5k rectangles), it still renders the whole 500k in less than a second.
– Orchaldir
Nov 24 '18 at 10:32
What hapen if thé first tome you load 1 rectangle ?
– charles Lgn
Nov 24 '18 at 10:33
An loading a different map, which changes the color of every rectangle is equally fast.
– Orchaldir
Nov 24 '18 at 10:34
The application starts with rendering a map with 200 rectangles. That happens very fast. Later it switches to the larger map and it slows down the 1.time rendering it.
– Orchaldir
Nov 24 '18 at 10:41
add a comment |
it's due to the cache. When you open something, you load many abojet, but when you close it, some data stay il your computer to load faster.
– charles Lgn
Nov 24 '18 at 10:26
Even if I modify part of the map (~5k rectangles), it still renders the whole 500k in less than a second.
– Orchaldir
Nov 24 '18 at 10:32
What hapen if thé first tome you load 1 rectangle ?
– charles Lgn
Nov 24 '18 at 10:33
An loading a different map, which changes the color of every rectangle is equally fast.
– Orchaldir
Nov 24 '18 at 10:34
The application starts with rendering a map with 200 rectangles. That happens very fast. Later it switches to the larger map and it slows down the 1.time rendering it.
– Orchaldir
Nov 24 '18 at 10:41
it's due to the cache. When you open something, you load many abojet, but when you close it, some data stay il your computer to load faster.
– charles Lgn
Nov 24 '18 at 10:26
it's due to the cache. When you open something, you load many abojet, but when you close it, some data stay il your computer to load faster.
– charles Lgn
Nov 24 '18 at 10:26
Even if I modify part of the map (~5k rectangles), it still renders the whole 500k in less than a second.
– Orchaldir
Nov 24 '18 at 10:32
Even if I modify part of the map (~5k rectangles), it still renders the whole 500k in less than a second.
– Orchaldir
Nov 24 '18 at 10:32
What hapen if thé first tome you load 1 rectangle ?
– charles Lgn
Nov 24 '18 at 10:33
What hapen if thé first tome you load 1 rectangle ?
– charles Lgn
Nov 24 '18 at 10:33
An loading a different map, which changes the color of every rectangle is equally fast.
– Orchaldir
Nov 24 '18 at 10:34
An loading a different map, which changes the color of every rectangle is equally fast.
– Orchaldir
Nov 24 '18 at 10:34
The application starts with rendering a map with 200 rectangles. That happens very fast. Later it switches to the larger map and it slows down the 1.time rendering it.
– Orchaldir
Nov 24 '18 at 10:41
The application starts with rendering a map with 200 rectangles. That happens very fast. Later it switches to the larger map and it slows down the 1.time rendering it.
– Orchaldir
Nov 24 '18 at 10:41
add a comment |
1 Answer
1
active
oldest
votes
I found an answer! :-D
I render the large map with PixelWriter into an WritableImage and then draw the image on the canvas. Now the rendering takes less than 1 second!
See commit.
answered Dec 4 '18 at 21:49
OrchaldirOrchaldir
116
add a comment |
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1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
I found an answer! :-D
I render the large map with PixelWriter into an WritableImage and then draw the image on the canvas. Now the rendering takes less than 1 second!
See commit.
answered Dec 4 '18 at 21:49
OrchaldirOrchaldir
116
add a comment |
I found an answer! :-D
I render the large map with PixelWriter into an WritableImage and then draw the image on the canvas. Now the rendering takes less than 1 second!
See commit.
answered Dec 4 '18 at 21:49
OrchaldirOrchaldir
116
add a comment |
I found an answer! :-D
I render the large map with PixelWriter into an WritableImage and then draw the image on the canvas. Now the rendering takes less than 1 second!
See commit.
answered Dec 4 '18 at 21:49
OrchaldirOrchaldir
116
I found an answer! :-D
I render the large map with PixelWriter into an WritableImage and then draw the image on the canvas. Now the rendering takes less than 1 second!
See commit.
answered Dec 4 '18 at 21:49
OrchaldirOrchaldir
116
answered Dec 4 '18 at 21:49
OrchaldirOrchaldir
116
answered Dec 4 '18 at 21:49
OrchaldirOrchaldir
116
answered Dec 4 '18 at 21:49
OrchaldirOrchaldir
116
116
add a comment |
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it's due to the cache. When you open something, you load many abojet, but when you close it, some data stay il your computer to load faster.
– charles Lgn
Nov 24 '18 at 10:26
Even if I modify part of the map (~5k rectangles), it still renders the whole 500k in less than a second.
– Orchaldir
Nov 24 '18 at 10:32
What hapen if thé first tome you load 1 rectangle ?
– charles Lgn
Nov 24 '18 at 10:33
An loading a different map, which changes the color of every rectangle is equally fast.
– Orchaldir
Nov 24 '18 at 10:34
The application starts with rendering a map with 200 rectangles. That happens very fast. Later it switches to the larger map and it slows down the 1.time rendering it.
– Orchaldir
Nov 24 '18 at 10:41