Changed behavior of millisecondClockValue on OS/390
Beginning with VisualAge Smalltalk Server for OS/390 and z/OS V6.0, the millisecondClockValue method returns a value based on the STCK assembler instruction, which gives the current value of the time-of-day clock (TOD).  For versions prior to VisualAge Smalltalk Server for OS/390 and z/OS V6.0, the millisecondClockValue method returned the application CPU usage time. 
 
Last modified date: 07/02/2019