How did the release of COBOL/370 version 1.3 improve the performance of release 1.1?

All features of Release 1.1 and running with LE/370 Release 3 - Improved performance over COBOL/370 version 1.3 - Code for storage and initialization for unreferenced data items is eliminated with the OPTIMIZE(FULL) option - NORENT programs with more than 16mb line are supported by RMODE option - WORKING-STORAGE variables are initialized statically for NORENT programs at compile time - CALL statement with USING phrase is provided with optimized parameter list generation - LINKAGE SECTION data items are provided with variable-length MOVE - Main entry point is provided with optimized code generation - A literal can be called dynamically using CALL - Availability of Library Routine Retention.