Re: 90% probability for extra loop in copas.send(), copas.sendto()

["Soni L." <fakedme@...>]

On 12/01/15 02:43 PM, Oliver Kroth wrote:
> Hi,
>
> I am puzzled about a few lines of code in the Copas library functions 
> copas.send() and copas.sendto():
>
>     if (math.random(100) > 90) then
>       _writing_log[client] = gettime()
>       coroutine.yield(client, _writing)
>     end
I believe that is 10%...?
> This takes care that send() will give other coroutines a chance to 
> run, which is good as otherwise one coroutine may send all the time 
> and no other can be resumed.
> E.g. you have a web server where one coroutine sends a download, while 
> other coroutines wait for incoming connections; these would be blocked 
> until the download is finished.
>
> But why is this behaviour coupled to a probabilistic value?
>
> --
> Oliver

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