New to threads. How do they work?

[Lawrence D'Oliveiro]

In message <12c1sc8ftj2m3a1 at corp.supernews.com>, Grant Edwards wrote:

> On 2006-07-21, Lawrence D'Oliveiro <ldo at geek-central.gen.new_zealand>
> wrote:
>> In message <1153361291.923692.45330 at s13g2000cwa.googlegroups.com>, gel
>> wrote:
>>
>>> I am attempting to understand threads to use in a network app which I
>>> am writing.
>>
>> It is written, somewhere in the philosophy of *nix programming, that
>> threads are a performance hack, to be avoided wherever possible. Use
>> processes in preference to threads.
> 
> I've never understood the aversion people seem to have to
> threads.

Perhaps because with threads, data is shared by default. Whereas with
processes, it is private by default, and needs to be explicitly shared if
you want that.