Derek Zhou writes:

> Derek Zhou writes:
>
>> Robert Pluim writes:
>>
>>> Thatʼs always possible. You'd have to stick some instrumentation in
>>> things like connect_network_socket and wait_reading_process_output to
>>> narrow it down.
>>>
>> I think what happened is gnutls's internal buffering exhausts the
>> available data from the socket, so select blocks. There is an comment in
>> the code said gnutls leave one byte in the socket for select, but I
>> don't think it is doing this anymore. The following patch move the check
>> before the select and skip the select if there is data to be read in
>> gnutls. It fixed the occational stall in https.
>
> Sorry, the previous patch was wrong. Cannot reuse the fd_set intended
> for select. Corrected:
>
Version 3, add safty guard for tls read detection. Please use this one.
You may want to review this carefully.