Adding Another note to myself.
My Early 2015 Intel MacBook Pro has a GB6 Single Core of 974, and Multi Core 1931.
An Early 2025 M4 MacBook Air has a GB6 Single Core of 3700, and Multi Core 14600.
That is 3.7x faster at single core and ~7.5x faster in Multi Core over the span of 10 years. May be M5 is even faster.
On GPU Metal MBP 2015 is roughly ~5500 while 2025 M4 is roughly 55000. So 10x.
Edit: The M4 Pro has a TDP of 32W and PL2 of 40W. So not a very good comparison to Max 28W of Intel Core i5-5257U. But still adding it here.
M4 Pro GB6 3840, Multi Core 20400. Metal 105814.