On Wed, July 6, 2005 5:35 pm, Dan Rossi said:
>
> On 07/07/2005, at 10:26 AM, Richard Lynch wrote:
>> "slow" switch
>
> You're a funny man Richard. So how is there overhead using callbacks if
> you dont mind me asking ?
I believe the callbacks imply a function stack, pushing/popping arguments,
and
On Wed, 2005-07-06 at 20:26, Richard Lynch wrote:
> On Wed, July 6, 2005 3:08 pm, Robert Cummings said:
> >> > Well i do find a performance issue running a heap of switches in PHP
> >> so
> >> > I could presume the same here.
> >>
> >> I believe that what's supposed to happen, in theory, is that th
On 07/07/2005, at 10:26 AM, Richard Lynch wrote:
"slow" switch
You're a funny man Richard. So how is there overhead using callbacks if
you dont mind me asking ?
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On Wed, July 6, 2005 3:08 pm, Robert Cummings said:
>> > Well i do find a performance issue running a heap of switches in PHP
>> so
>> > I could presume the same here.
>>
>> I believe that what's supposed to happen, in theory, is that the
>> compiler
>> *CONVERTS* the swith statement to a bunch of
On Wed, 2005-07-06 at 17:51, Richard Lynch wrote:
> On Tue, July 5, 2005 10:55 pm, Dan Rossi said:
> >
> > On 06/07/2005, at 3:43 PM, Rasmus Lerdorf wrote:
> >
> >> The SWITCH vm was originally just a big switch(opcode) { case 1: ...;
> >> case 2: ...' } It's a bit different now, but you can think
On Tue, July 5, 2005 10:55 pm, Dan Rossi said:
>
> On 06/07/2005, at 3:43 PM, Rasmus Lerdorf wrote:
>
>> The SWITCH vm was originally just a big switch(opcode) { case 1: ...;
>> case 2: ...' } It's a bit different now, but you can think of it in
>> those terms. Decent compilers should theoreticall
On Wed, July 6, 2005 2:26 am, Xuefer said:
> but any manage to compile switch/goto vm?
> CFLAGS=-g3 -O3 -Wall -march=pentium3 -pipe
> it takes all my memory and bunch of swap without ending the compilation
> gcc version 3.4.4 (cygming special) (gdc 0.12, using dmd 0.125)
MAYBE try that "NO-INLINE"
but any manage to compile switch/goto vm?
CFLAGS=-g3 -O3 -Wall -march=pentium3 -pipe
it takes all my memory and bunch of swap without ending the compilation
gcc version 3.4.4 (cygming special) (gdc 0.12, using dmd 0.125)
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On 06/07/2005, at 3:43 PM, Rasmus Lerdorf wrote:
The GOTO mechanism uses a bit of a compiler trick known as
"computed gotos" to try to make each one a very simple branch at the
assembly level. It looks like this in C:
That is, we can dynamically create a list of labels and then use a GOTO
t
Dan Rossi wrote:
>
> On 06/07/2005, at 5:05 AM, Jochem Maas wrote:
>
>>
>> well I hadn't got a clue about this vm stuff but I read that
>> there are CALL, GOTO and SWITCH [vm?] models implemented. according to
>> 'Seb' CALL goes fastest. But I would assume that offering different vm
>> model
On 06/07/2005, at 5:05 AM, Jochem Maas wrote:
well I hadn't got a clue about this vm stuff but I read that
there are CALL, GOTO and SWITCH [vm?] models implemented. according to
'Seb' CALL goes fastest. But I would assume that offering different vm
models meant that raw speed is not the only
Rasmus Lerdorf wrote:
Dan Rossi wrote:
Continouing from my previous email I have been reading further on Seb's
blogs regarding bechmarks with PHP5.1 and the different vm's that it
compiles with. I dont particularly understand what the virtual machine
is for, but he does meantion threading. Does
On 06/07/2005, at 12:08 AM, Rasmus Lerdorf wrote:
Dan Rossi wrote:
Continouing from my previous email I have been reading further on
Seb's
blogs regarding bechmarks with PHP5.1 and the different vm's that it
compiles with. I dont particularly understand what the virtual machine
is for, but he
Dan Rossi wrote:
> Continouing from my previous email I have been reading further on Seb's
> blogs regarding bechmarks with PHP5.1 and the different vm's that it
> compiles with. I dont particularly understand what the virtual machine
> is for, but he does meantion threading. Does this mean PHP5.1
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