---
name: "pcre2_jit_free_unused_memory"
section: "3"
platform: "linux"
package: "pcre2"
version: "10.49-1"
release: "Arch Linux 2026-11-01"
platforms: ["linux"]
url: "https://new.carta.tech/pcre2_jit_free_unused_memory"
---

# pcre2\_jit\_free\_unused\_memory(3)

Perl-compatible regular expressions (revised API)

## NAME

PCRE2 - Perl-compatible regular expressions (revised API)

## SYNOPSIS

**#include \<pcre2.h\>**

```
void pcre2_jit_free_unused_memory(pcre2_general_context *gcontext);
```

## DESCRIPTION

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 freed.

There is a complete description of the PCRE2 native API in the **pcre2api** page and a description of the POSIX API in the **pcre2posix** page.