Re: [INFO] African Grey array speedup

2002-10-03 Thread Peter Gibbs
Leopold Toetsch wrote: > Please compare to intlist. new P0, . set I0, 1 set I1, 0 loop: set P0, I0 set P0[I1], I0 inc I0 inc I1 lt I0, 10, loop set I2, 0 loop_sc: set I3, P0[I2] inc I2 lt I2, I1, loop_sc end Time Array 13 minutes 18 seconds PerlArray 1

Re: [INFO] African Grey array speedup

2002-10-02 Thread Leopold Toetsch
Peter Gibbs wrote: > Simon Cozens wrote: >>Put another loop in, which sets I1 to every array element in turn, >>(maybe make this an inner loop which runs each time you extend) and >>re-benchmark. > 25000: CVS = 47 seconds, grey = 1 second Please compare to intlist. leo

Re: [INFO] African Grey array speedup

2002-10-02 Thread Peter Gibbs
Leopold Toetsch wrote: > Peter Gibbs wrote: > Did you look at indexed access, shift, unshift, splice ;-) I have simply modified classes/array.pmc, which does not yet implement shift or unshift; grey aims to provide alternative implementations, rather than add new functionality. However, since Dan

Re: [INFO] African Grey array speedup

2002-10-02 Thread Peter Gibbs
Simon Cozens wrote: > That's great, but what impact does it have on access to individual > elements? If you're not careful, you may find that accessing stuff in > the array gets quite seriously slower. Linked lists being O(n) access > and all that... I certainly hope that access gets slower, othe

Re: [INFO] African Grey array speedup

2002-10-02 Thread Leopold Toetsch
Peter Gibbs wrote: > I have been looking at other areas for improvements. > Arrays seem to be one such area, ... Yep > This is using a singly linked list of variable sized chunks, > without a separate index array. Each chunk is created > with a minimum size (4 entries at present), then doubl

Re: [INFO] African Grey array speedup

2002-10-02 Thread Dan Sugalski
At 5:27 PM +0200 10/2/02, Peter Gibbs wrote: >On my machine, CVS parrot completes the above in >an elapsed time of 13 minutes; grey takes 14 seconds. Cool. Since this is a PMC class, I expect, and thus self-contained (right? :) it ought to be fine to check it in as an alternate array. If you co

Re: [INFO] African Grey array speedup

2002-10-02 Thread Simon Cozens
[EMAIL PROTECTED] (Peter Gibbs) writes: > On my machine, CVS parrot completes the above in > an elapsed time of 13 minutes; grey takes 14 seconds. > Changing the iteration count to 25000 takes 1 second > with grey versus 46 seconds for CVS. That's great, but what impact does it have on access

[INFO] African Grey array speedup

2002-10-02 Thread Peter Gibbs
Having decided that life.pasm was not going to get much better (58 seconds for 5000 generations vs 118 for CVS), I have been looking at other areas for improvements. Arrays seem to be one such area, as the current CVS code expands arrays by creating a new one and copying all the data. I believe L