On Friday, 7 February 2014 at 15:33:01 UTC, Adam D. Ruppe wrote:
On Friday, 7 February 2014 at 11:37:16 UTC, Ola Fosheim Grøstad
wrote:
How slow is slow? Is it slower than in Go and Python?
One problem with allocating the exception is the stop-the-world
thing. My cgi.d's built in httpd does some allocations in its
constructor, which is run once per request. It can answer
requests at a rate of about 6000/sec on my computer...
Until the allocation have gone too much and the GC starts
running. Then all the pending requests stop, killing the
throughput.
(BTW, interestingly, on Linux it uses separate process pools
instead of threads. The GC does NOT stop the world since the
other processes can keep going. But, if the requests are fairly
uniform - as is typically the case with benchmarks - each
process hits the GC threshold at about the same time....
ironically, it is the deterministic nature of the GC that leads
to the performance killer there.)
It's obviously not a solution, but you could change that by
having each process call GC.reserve() with a different size.
