Re: speed of Net::LDAP

[John B. <joh...@ne...>]

> Net::LDAP already does this to some extent. But I think one of the big
> startup costs is that Convert::ASN1 must parse the ASN.1 for the protocol.
> 
> gbarr@chipper:~/src/ldap > time perl -Ilib -e0
> perl -Ilib -e0  0.00s user 0.00s system 0% cpu 0.000 total
> 
> gbarr@chipper:~/src/ldap > time perl -Ilib -MNet::LDAP -e0
> perl -Ilib -MNet::LDAP -e0  0.38s user 0.00s system 64% cpu 0.593 total
> 
> gbarr@chipper:~/src/ldap > time perl -Ilib -MNet::LDAP::ASN -e0
> perl -Ilib -MNet::LDAP::ASN -e0  0.25s user 0.00s system 32% cpu 0.763 total
> 
> As you can see it is a large % of the load time.
> 
> It should be possible to just parse this on install and dump it to a file.

Thats interesting, because it hints that XSing Convert::ASN1 might not
help as much as might be expected (is parsing much quicker in C than
perl?).

Would a reasonable approach to be to have 'compile' and 'decompile'
methods in Convert::ASN1 which convert between 'readable' :-) ASN.1 and
something nearer the internal representation? Then, as you say, do a
'compile' on install or first run and save the results? (I guess there
isn't a sensible place to keep an on-disk cache of compiled ASN1
definitions).

jb