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Diffstat (limited to 'package/libs/pcre2/Config.in')
| -rw-r--r-- | package/libs/pcre2/Config.in | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/package/libs/pcre2/Config.in b/package/libs/pcre2/Config.in new file mode 100644 index 0000000000..8777a4e84c --- /dev/null +++ b/package/libs/pcre2/Config.in @@ -0,0 +1,30 @@ +config PCRE2_JIT_ENABLED + bool + depends on PACKAGE_libpcre2 && (aarch64 || aarch64_be || arm || i386 || i686 || x86_64 || mips || mipsel || mips64 || mips64el || powerpc || powerpc64 || powerpcle || sparc) + default y if (arm || i686 || x86_64) + prompt "Enable JIT compiler support" + help + Enable JIT (Just-In-Time) compiler support. + + Just-in-time compiling is a heavyweight optimization that can greatly + speed up pattern matching. However, it comes at the cost of extra + processing before the match is performed, so it is of most benefit when + the same pattern is going to be matched many times. This does not + necessarily mean many calls of a matching function; if the pattern is + not anchored, matching attempts may take place many times at various + positions in the subject, even for a single call. Therefore, if the + subject string is very long, it may still pay to use JIT even for + one-off matches. JIT support is available for all of the 8-bit, 16-bit + and 32-bit PCRE2 libraries and adds about 100KB to the resulting + libpcre2.so. JIT support applies only to the traditional Perl-compatible + matching function. It does not apply when the DFA matching function is + being used. + + Enabling this option can give an about 10x performance increase on JIT + operations. It can be desireable for e.g. high performance Apache + mod_rewrite or HA-Proxy reqrep operations. + + However, JIT should _only_ be enabled on architectures that are supported. + Enabling JIT on unsupported platforms will result in a compilation + failure. A list of supported architectures can be found here: + https://pcre.org/current/doc/html/pcre2jit.html#SEC2 |