[no1lives4ever]

Turbo Pascal back in the day was super fast. One of the fastest compiled languages I had used before we had incremental compilers and background incremental compilation. C/C++ compilers have mostly been a lot slower than those old Turbo Pascal implementations. MS Quick C 1.1 was a notable exception in the C compiler space. It could do 1 pass in memory compilation of most c code. Modern frameworks feel way slower even with scripting languages that require no compiles.

Coming to think of it, my 486 from early 90s when running DOS was one of the fastest computers I have used when it comes to bootup and applicaion load times. I was like type name of program, press enter and the program is up and ready to use. The systems that I had before that did take a lot longer to launch programs and anything with Windows has always felt an order of a magnitude slower. Modern tiny linux disros can match that speed, but then that is only with a very slimmed down system minus any gui. The MacBook Pro with M1 Pro did feel a lot faster than previous macs or windows machines when it came to application launch times and general gui responsiveness, but still no match to those DOS systems.

[deterministic]

My experience as well. Apparently the Turbo Pascal developer implemented the compiler as a one pass compiler generating machine code while parsing. It dramatically reduces memory usage and increase speed, while reducing the opportunity to optimize the machine code at a higher level.