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Reply | Forward Message #14677 of 15019 |
Hi GBAlist!

Has anyone made tests on the speed of the LZ77 Bios
decompression funcions?

How do they compare with CpuSet and FastCpuSet? and
DMA Transfer?

All of them copy data from source to destination
(albeit with compression read data is normally smaller
than written data) so a relative comparison would be
possible and would be very useful in deciding when to
use compression.

Thanks in advance

Ronald




Tue Dec 23, 2003 9:50 pm

ronald_chenu
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Message #14677 of 15019 |
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Hi GBAlist! Has anyone made tests on the speed of the LZ77 Bios decompression funcions? How do they compare with CpuSet and FastCpuSet? and DMA Transfer? All...
Ronald Chenu Abente
ronald_chenu
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Dec 24, 2003
11:21 am

Hello Ronald, Wednesday, December 24, 2003, 12:50:04 AM, you wrote: RCA> Has anyone made tests on the speed of the LZ77 Bios RCA> decompression funcions? about...
Aleksey N. Malov
vivid_bwteam
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Dec 24, 2003
2:51 pm

Merry Christmas to all! ... I see, but since you are actually making a transfer of less data (because of the compression) that would become 360-600 KB per...
ronald_chenu
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Dec 27, 2003
1:02 am

... Ever tried caching decompressed cels in EWRAM? -- Damian...
Damian Yerrick
yerricde
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Dec 28, 2003
3:08 pm

... The following are my assumptions, please feel free to correct them. Caching to the EXTRAM (or VRAM itself by double buffering) will have the following...
ronald_chenu
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Dec 29, 2003
3:40 pm

... (paraphrasing here) ... Correct. EWRAM to VRAM transfers run at 4 cycles per 2 bytes, filling the entire 32 KB sprite cel VRAM within about 66,000 cycles....
Damian Yerrick
yerricde
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Dec 31, 2003
11:12 am

... have ... That will hold only if your data is uncompressed and that you are doing a DMA transfer, I suppose ... Interesting, by implementing this kind of...
ronald_chenu
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Jan 1, 2004
11:07 am
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