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Topic: New version of BBC-SDL released (Read 1586 times) |
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David Williams
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Re: New version of BBC-SDL released
« Reply #2 on: Feb 2nd, 2017, 08:35am » |
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I've just been playing 'Buggy' (under BBC-SDL) on my ARM-based Motorola Moto G4 
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David Williams
Developer
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meh
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Posts: 452
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Re: New version of BBC-SDL released
« Reply #3 on: Feb 3rd, 2017, 08:10am » |
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I just run 'sorttest.bbc' (under BBC-SDL) on both my Moto G4 smartphone (Snapdragon 617 ARM-based CPU), and my Laptop PC (Intel Celeron T1600), and the Snapdragon won hands down in terms of the reported timings.
For instance, the sorting of three 10000-element float64 arrays took 0.1 seconds on the Intel laptop, but only 0.03 seconds on the Moto G4. Even more interestingly, my Intel Core-i7 based desktop PC took 0.03 seconds!
I wonder what's going on here? The Snapdragon 617 is, I think, a middle-of-the-range processor, not high-end. I wouldn't have expected the Moto G4 to 'win' over a Celeron-based PC, and certainly not tie with a Core-i7.
In any case, Richard's done great work.
[UPDATE]: Having since run a different speed test - 'timing.bbc' which is included in the BBC-SDL package - I see that the performance on the Celeron-based laptop is at least twice as fast in most of the tests, typically 3 times faster, sometimes more. This is much more in line with my expectations!
David.
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