This function frees unused JIT executable memory. The argument is a general
context, for custom memory management, or NULL for standard memory management.
JIT memory allocation retains some memory in order to improve future JIT
compilation speed. In low memory conditions,
pcre2_jit_free_unused_memory() can be used to cause this memory to be
There is a complete description of the PCRE2 native API in the
page and a description of the POSIX API in the