Hi Steve,
On 7/3/2015 9:29 AM, Steven Franke wrote:
> Joe and wspr in wsjtx testers:
>
> I’ve significantly improved the efficiency of the sync-search in the current
> version (r5668) of wsprd_exp.c. On a large (1953 files) batch of files
> representing all bands and the entire diurnal cycle the r5668 wsprd and
> wsprd_exp compare as follows:
>
> wsprd:
> 5083 decodes in 1294s (29% in sync0 and 17% in Fano)
>
> wsprd_exp:
> 5132 decodes in 970s (9% sync0 and 24% in Fano)
>
> Approximately 25% decrease in average execution time with no decrease (maybe
> a slight increase) in performance.
>
> If you get a chance and can confirm that you also see a significant time
> savings, then I propose that we make this version of wsprd_exp the new
> default wsprd. At some point we should be able to cash in some of the time
> saved for more decodes.
I ran the same test as previously, this time using wsprd_exe built from
your code in r5668. Here's my table from before, with the new results
added as line 7:
Decodes Time1 AvgTime Improvement Decoder
(s) (s) Decodes Speed
----------------------------------------------------------------
1. 1451 2111 5.5 1.00 1.00 baseline
2. 1693 1599 4.1 1.17 1.32 wspr4
3. 2208 335 0.9 1.52 6.30 WSJT-X v1.6.0 r5636
4. 2464 413 1.1 1.70 5.11 partial coherence
5. 2567 431 1.1 1.77 4.90 full coherence
6. 2839 2136 5.5 1.96 0.99 more candidates
7. 2570 428 1.1 1.77 4.93 r5668
On this batch of files (all 20 meters, many decodable signals per file)
the results are nearly the same as those of my Run#5 ("subtraction with
full coherence and test for local maxima"). Slightly faster, slightly
more decodes.
-- Joe
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