Here is a more precise phrasing of the question:
What would be the average speed decrease of a modern CPU when the speculative execution feature is disabled?
Post your opinions backed up by reasons. That is, don't just say "it would be about XX% decrease", you need to explain why are you...
This thread is currently discussing the topic:
Performance boost of Speculative Execution: what's the speedup? (Spectre-related discussion)
-- additional details are in the post #16 --
Title: Speculative Execution and Branch Prediction
I'm starting this thread to discuss...