On 10/28/21 6:11 AM, William F Pokorny wrote:
> On 10/28/21 3:02 AM, jr wrote:
...
> 
> Thank you. I've grabbed it. I'll need my morning coffee too! :-)
> 
...

Not yet to profiling, but I've turned up a few things. First, I don't 
see the +700% write side slow down you see, but rather about +280% so 
this is more in line with your expectations for write vs read.

I'm interested in where povr is and I was surprised to find it slower 
than p380b1.

On investigation found the parser updates coming after what is in the 
v3.8 betas(1) - which povr adopted / branched from - are themselves 
slower. More significantly so on the write side. My povr branch is 
running faster than the branch point, but... Guess for me that is the 
first thing to try and figure out.

Bill P.

(1) - Christoph backtracked the newest parser updates for the v3.8 release.

Ref:

stress_wr.pov  (100k)
p380   raw - 2.05user 0.25system 0:02.84elapsed 81%CPU
p380   fld - 6.87user 0.33system 0:07.74elapsed 93%CPU

p380b1 raw - 1.57user 0.02system 0:02.14elapsed 74%CPU
p380b1 fld - 6.02user 0.06system 0:06.61elapsed 91%CPU

povr   raw - 1.92user 0.24system 0:02.71elapsed 79%CPU
povr   fld - 6.39user 0.28system 0:07.21elapsed 92%CPU

p380b1 raw ---> fld  1.57 -> 6.02 ---> +283.44%  (You suggested +700%)
p380   raw ---> fld  2.05 -> 6.97 ---> +240.00%
povr   raw ---> fld  1.92 -> 6.39 ---> +232.81%

p380b1 -> p380 raw  1.57 -> 2.05 ---> +30.57% (p380 povr branch point)
p380   -> povr raw  2.05 -> 1.92 ---> -6.34%  (povr < 380 branch point)

p380b1 -> p380 fld  6.02 -> 6.87 ---> +14.12% (p380 povr branch point)
p380   -> povr fld  6.87 -> 6.39 --->  -6.99% (povr < 380 branch point)


stress_rd.pov  (100k)
p380   raw - 0.64user 0.02system 0:01.20elapsed 55%CPU
p380   fld - 8.39user 0.08system 0:09.00elapsed 94%CPU

p380b1 raw - 0.62user 0.03system 0:01.19elapsed 54%CPU
p380b1 fld - 7.69user 0.07system 0:08.29elapsed 93%CPU

povr   raw - 0.61user 0.01system 0:01.17elapsed 53%CPU
povr   fld - 7.90user 0.06system 0:08.50elapsed 93%CPU

p380b1 raw ---> fld  0.62 -> 7.69 ---> +1140.32%
p380   raw ---> fld  0.64 -> 8.39 ---> +1210.94%
povr   raw ---> fld  0.61 -> 7.90 ---> +1195.08%

p380b1 -> p380 raw  0.62 -> 0.64 ---> +3.23% (p380 povr branch point)
p380   -> povr raw  0.64 -> 0.61 ---> -4.69% (povr < 380 branch point)

p380b1 -> p380 fld  7.69 -> 8.39 ---> +9.10% (p380 povr branch point)
p380   -> povr fld  8.39 -> 7.90 ---> -5.84% (povr < 380 branch point)

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