I've moved to my old "faster" Windows PC. Despite being an older model:
Intel(R) Core(TM) i5-7300U CPU @ 2.60GHz 2.70 GHz with just 8 GB RAM (older and
I assume slower SSD, maybe not), it's not plagued by the same CPU-hungry
Anti-Virus Anti-Malware software running in background. The situation is
totally different, and the parallel version is slightly faster than serial one
(10 secs vs 15 secs), but this is happening on both Nim 2.0.0 and Nim 1.4.4.
Performance wise they are rather in par... however, to be fair, 1.4.4 parallel
version crash sometimes, so 2.0.0 in this respect is a more solid choice:
PS C:\Users\Andrea\Documents\Nim\testing_code\nim_parallel> ./unzip_parallel
unzip of all files completed in: 10.024 secs
PS C:\Users\Andrea\Documents\Nim\testing_code\nim_parallel> ./unzip_parallel
unzip of all files completed in: 11.237 secs
PS C:\Users\Andrea\Documents\Nim\testing_code\nim_parallel> ./unzip_parallel
unzip of all files completed in: 10.553 secs
PS C:\Users\Andrea\Documents\Nim\testing_code\nim_parallel>
./unzip_parallel_old
oserr.nim(94) raiseOSError
Error: unhandled exception: The handle is invalid.
[OSError]
PS C:\Users\Andrea\Documents\Nim\testing_code\nim_parallel>
./unzip_parallel_old
unzip of all files completed in: 10.858 secs
PS C:\Users\Andrea\Documents\Nim\testing_code\nim_parallel>
./unzip_parallel_old
unzip of all files completed in: 10.202 secs
PS C:\Users\Andrea\Documents\Nim\testing_code\nim_parallel>
./unzip_parallel_old
oserr.nim(94) raiseOSError
Error: unhandled exception: The handle is invalid.
[OSError]
PS C:\Users\Andrea\Documents\Nim\testing_code\nim_parallel>
./unzip_parallel_old
unzip of all files completed in: 10.877 secs
Run
Bottom line is: my work PC sucks, and installed software, particularly
antivirus / anti-malware (the latter is eating 293 MB and being often the top
process for CPU usage) could really hurt performance in an unpredictable manner
(on my work PC serial version can use at most 14.9% of CPU, and parallel drops
much lower, down to 2-3%, on my old home PC, parallel version use more than 95%
CPU) . Thank you and sorry for bothering you.
