@Wayne: thanks for pointing out the difference in default models!
> Okay, I reran with RAxML v8 using GTRGAMMAX. RAxML-ng still wins (ML -1068519.089387 for the new
> run). Any idea why RAxML-ng is 3x slower?
Because raxml-ng search heuristic has a couple of small modifications which make it a bit more
thorough. Typically, the difference in runtime is not that huge, oftentimes it is even compensated
by technical performance improvements. Here we have an extreme case, where raxml-ng apparently
performed many more SPR rounds (can be confirmed by checking RAxML_log.<NAME> file), but also found
a much better-scoring tree (570 logLH points is quite a diff). Btw, from the log file you can see
that after ~5h raxml-ng reached the likelihood which is better than the final likelihood of RAxML v8
tree.
(technically, it seems like RAxML v8 has chosen a smaller FAST SPR radius here, you can check
RAxML_info file to confirm)
Best,
Alexey
> On Tuesday, July 7, 2020 at 6:24:33 PM UTC-7, Wayne Pfeiffer wrote:
>
> Hi Jeff,
>
> The default treatment of the stationary frequencies is different in RAxML-NG from standard
> RAxML. To compare the likelihood scores, you need to use the same treatment.
>
> empiricalGTRGAMMA (default)GTR+F+G
> ML estimateGTRGAMMAXGTR+G (default)
>
> Since standard RAxML is faster, I suggest that you rerun it with GTRGAMMAX.
>
> Best regards, Wayne
>
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