[PATCH] Lazy symbol table initialization

Hi, The proposed patch delays EG(active_symbol_table) initialization till it 's really needed. Most functions don't need EG(active_symbol_table) at all, as they use IS_CV variables and HashTable initialization and updating just waste of time. The patch doesn't break any PHPT tests, it gives about 12% speedup on bench.php and also shows some speed improvement on real-life applications (with opcode cache). In case some extension needs EG(active_symbol_table) it can initialize it using the following code: if (!EG(active_symbol_table)) { zend_rebuild_symbol_table(TSRMLS_C); } I'm going to commit the patch on next week in case of no objections. Thanks. Dmitry.