DB48X: HP48-like RPL implementation for DM42

[raprism]

(07-11-2023 10:16 AM)c3d Wrote:  

(07-10-2023 09:46 PM)Helix Wrote:  I would be curious to know the result for this benchmark too.

I used the following program:

Code:


« Ticks 0 1 10000
for i
    i atan sin exp cbrt +
next Ticks Rot - »

The result for 10'000 loops is
- USB: 12.5s (stock DM42 is 26s)
- Battery: 36.4s (stock DM42 is 65.73s)
[/code]

Because of the current release doc in dev branch ("0.8.4") I researched to find the code of this benchmark "floating point sum" test. With 0.8.4 self-compiled from dev branch, and the released 0.8.3 I used this code:

Code:


« Ticks 0 1 1000
for i
    i atan sin exp cbrt +
next Ticks Rot - 1000 ÷ » 'T1K' STO

Note that T1K uses 1000 instead of 10000 loops, because timings were far slower as expected - although I can confirm the speed-up from 0.8.3 to 0.84. Results for DM42 USB-powered are:

• 0.8.3 ~18.3 s
• 0.8.4 ~16.2 s
  

What might be the reason that some early db48x version was much faster when running this test?