Uploaded August 2026 | Updated September 2026, 2 weeks ago

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The CPU can take time to find out the time, so how does it know the time? Matt Godbolt is the genius behind Compiler Explorer and the Godbolt BBC Micro Emulator, find more from him at godbolt.org

Computerphile is supported by Jane Street. Learn more about them (and exciting career opportunities) at: jane-st.co/computerphile

This video was filmed and edited by Sean Riley.

Computerphile is a sister project to Brady Haran's Numberphile. More at bradyharanblog.com