"It would be ridiculous to expect Selkirk Musical Theatre Group to be the same as a West End or Broadway show but it's getting up there in many respects - in terms of abilities and production values they have done an amazing job."
The TLB lookup is combinational -- it evaluates in the same half-cycle as the limit check, requiring no additional clock. The common case (TLB hit, no page boundary crossing) adds zero overhead to a memory access. This is why the Segment Descriptor Cache and Page Cache (TLB) together occupy such substantial die area -- they are the fast path that makes protected mode competitive with real mode.
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