RE: Stacks, registers, and bytecode. (Oh, my!)

> On Tue, Jun 05, 2001 at 11:25:09AM +0100, Dave Mitchell wrote:
> > This is the bit that scares me about unifying perl ops and regex ops:
> > can we really unify them without taking a performance hit?
> 
> Coupl'a things: firstly, we can make Perl 6 ops as lightweight as we like.
> 
> Second, Ruby uses a giant switch instead of function pointers for their
> op despatch loop; Matz says it doesn't make that much difference in
> terms of performance.

Function pointer dispath is normally faster or as fast as switch. The main
down side is the context. A typical regular expression engine can pre-fetch
many variables into "register local", they can be efficiently used by
all switch cases. However, the common context for regular expression is
relative small, I am not sure of the performance hit.

Hong

• Stacks, registers, and bytecode. (Oh, my!) by Dan Sugalski
• Re: Stacks, registers, and bytecode. (Oh, my!) by Dave Mitchell
• RE: Stacks, registers, and bytecode. (Oh, my!) by Hong Zhang
• RE: Stacks, registers, and bytecode. (Oh, my!) by Dan Sugalski
• Re: Stacks, registers, and bytecode. (Oh, my!) by Uri Guttman
• Re: Stacks, registers, and bytecode. (Oh, my!) by Nick Ing-Simmons
• Re: Stacks, registers, and bytecode. (Oh, my!) by Bryan C . Warnock
• Re: Stacks, registers, and bytecode. (Oh, my!) by Dan Sugalski
• Re: Stacks, registers, and bytecode. (Oh, my!) by Larry Wall
• Re: Stacks, registers, and bytecode. (Oh, my!) by merlyn
• Re: Stacks, registers, and bytecode. (Oh, my!) by Dan Sugalski
• Re: Stacks, registers, and bytecode. (Oh, my!) by Nathan Torkington
• Re: Stacks, registers, and bytecode. (Oh, my!) by Jarkko Hietaniemi
• Re: Stacks, registers, and bytecode. (Oh, my!) by Dave Mitchell
• Re: Stacks, registers, and bytecode. (Oh, my!) by Nick Ing-Simmons
• Re: Stacks, registers, and bytecode. (Oh, my!) by Dave Mitchell
• Re: Stacks, registers, and bytecode. (Oh, my!) by Dan Sugalski
• Re: Stacks, registers, and bytecode. (Oh, my!) by Dave Storrs
• RE: Stacks, registers, and bytecode. (Oh, my!) by Hong Zhang
• RE: Stacks, registers, and bytecode. (Oh, my!) by Hong Zhang
• RE: Stacks, registers, and bytecode. (Oh, my!) by Dan Sugalski
• Re: Stacks, registers, and bytecode. (Oh, my!) by Uri Guttman
• Re: Stacks, registers, and bytecode. (Oh, my!) by Dave Mitchell
• Re: Stacks, registers, and bytecode. (Oh, my!) by Simon Cozens
• RE: Stacks, registers, and bytecode. (Oh, my!) by Hong Zhang
• Re: Stacks, registers, and bytecode. (Oh, my!) by Uri Guttman
• Re: Stacks, registers, and bytecode. (Oh, my!) by Dan Sugalski
• Re: Stacks, registers, and bytecode. (Oh, my!) by mooring
• Re: Stacks, registers, and bytecode. (Oh, my!) by Dan Sugalski
• Re: Stacks, registers, and bytecode. (Oh, my!) by Uri Guttman
• Re: Stacks, registers, and bytecode. (Oh, my!) by Nick Ing-Simmons
• Re: Stacks, registers, and bytecode. (Oh, my!) by Uri Guttman
• Re: Stacks, registers, and bytecode. (Oh, my!) by Dan Sugalski
• Re: Stacks, registers, and bytecode. (Oh, my!) by Larry Wall
• Re: Stacks, registers, and bytecode. (Oh, my!) by Uri Guttman
• Re: Stacks, registers, and bytecode. (Oh, my!) by Dan Sugalski
• Re: Stacks, registers, and bytecode. (Oh, my!) by Larry Wall
• Re: Stacks, registers, and bytecode. (Oh, my!) by Dan Sugalski
• Re: Stacks, registers, and bytecode. (Oh, my!) by Simon Cozens
• Re: Stacks, registers, and bytecode. (Oh, my!) by Uri Guttman
• Re: Stacks, registers, and bytecode. (Oh, my!) by Dan Sugalski
• Re: Stacks, registers, and bytecode. (Oh, my!) by Simon Cozens
• Re: Stacks, registers, and bytecode. (Oh, my!) by Jarkko Hietaniemi
• Re: Stacks, registers, and bytecode. (Oh, my!) by Dan Sugalski
• Re: Stacks, registers, and bytecode. (Oh, my!) by David L. Nicol
• Re: Stacks, registers, and bytecode. (Oh, my!) by Dan Sugalski
• Re: Stacks, registers, and bytecode. (Oh, my!) by Nick Ing-Simmons
• Re: Stacks, registers, and bytecode. (Oh, my!) by Larry Wall
• Re: Stacks, registers, and bytecode. (Oh, my!) by Jarkko Hietaniemi
• Re: Stacks, registers, and bytecode. (Oh, my!) by Bryan C . Warnock
• Re: Stacks, registers, and bytecode. (Oh, my!) by Larry Wall
• Re: Stacks, registers, and bytecode. (Oh, my!) by Jarkko Hietaniemi
• Re: Stacks, registers, and bytecode. (Oh, my!) by Graham Barr
• Re: Stacks, registers, and bytecode. (Oh, my!) by David L. Nicol
• Re: Stacks, registers, and bytecode. (Oh, my!) by Graham Barr
• Re: Stacks, registers, and bytecode. (Oh, my!) by Uri Guttman
• Re: Stacks, registers, and bytecode. (Oh, my!) by David L. Nicol
• Re: Stacks, registers, and bytecode. (Oh, my!) by Simon Cozens
• Re: Stacks, registers, and bytecode. (Oh, my!) by Jarkko Hietaniemi
• Re: Stacks, registers, and bytecode. (Oh, my!) by Nick Ing-Simmons
• Re: Stacks, registers, and bytecode. (Oh, my!) by Uri Guttman
• Re: Stacks, registers, and bytecode. (Oh, my!) by mooring
• Re: Stacks, registers, and bytecode. (Oh, my!) by Dan Sugalski
• Re: Stacks, registers, and bytecode. (Oh, my!) by Larry Wall
• Re: Stacks, registers, and bytecode. (Oh, my!) by Nick Ing-Simmons