A quick lookup for CPU speeds of yesteryear shows the Motorola 68040 in those macs did about 35 MFLOPS [1]. If you could parallelize this program to use all 2.

A quick lookup for CPU speeds of yesteryear shows the Motorola 68040 in those macs did about 35 MFLOPS [1]. If you could parallelize this program to use all 2.6 TFLOPS in a Macbook Air M1's 8-core GPU, you're seeing about 75,000x speed improvement. So a 12 hour "overnight" job may take just over half a second. [1] https://tech-insider.org/mac/research/1991/1021-e.html https://tech-insider.org/mac/research/1991/1021-e.html