Perl-совместимые регулярные выражения (Perl-compatible regular expressions)
POSIX MALLOC USAGE
When the 8-bit library is called through the POSIX interface (see
the pcreposix documentation), additional working storage is
required for holding the pointers to capturing substrings,
because PCRE requires three integers per substring, whereas the
POSIX interface provides only two. If the number of expected
substrings is small, the wrapper function uses space on the
stack, because this is faster than using malloc() for each call.
The default threshold above which the stack is no longer used is
10; it can be changed by adding a setting such as
--with-posix-malloc-threshold=20
to the configure command.
