GH-90699: Intern statically allocated strings (GH-93597)

This is similar to how strings are interned for deepfreeze.

1 files changed, 9 insertions, 0 deletions

diff --git a/Objects/unicodeobject.c b/Objects/unicodeobject.c
index d0e4bcd..669ffe7 100644
--- a/Objects/unicodeobject.c
+++ b/Objects/unicodeobject.c
@@ -52,6 +52,7 @@ OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 #include "pycore_pathconfig.h"    // _Py_DumpPathConfig()
 #include "pycore_pylifecycle.h"   // _Py_SetFileSystemEncoding()
 #include "pycore_pystate.h"       // _PyInterpreterState_GET()
+#include "pycore_runtime_init.h"  // _PyUnicode_InitStaticStrings()
 #include "pycore_ucnhash.h"       // _PyUnicode_Name_CAPI
 #include "pycore_unicodeobject.h" // struct _Py_unicode_state
 #include "stringlib/eq.h"         // unicode_eq()
@@ -14576,6 +14577,14 @@ _PyUnicode_InitGlobalObjects(PyInterpreterState *interp)
         return _PyStatus_OK();
     }
 
+    /* Intern statically allocated string identifiers and deepfreeze strings.
+     * This must be done before any module initialization so that statically
+     * allocated string identifiers are used instead of heap allocated strings.
+     * Deepfreeze uses the interned identifiers if present to save space
+     * else generates them and they are interned to speed up dict lookups.
+    */
+    _PyUnicode_InitStaticStrings();
+
 #ifdef Py_DEBUG
     assert(_PyUnicode_CheckConsistency(&_Py_STR(empty), 1));