[Top][All Lists]

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: [Chicken-users] inline vectors vs. srfi-9 records vs. non-inlined ve

From: Kon Lovett
Subject: Re: [Chicken-users] inline vectors vs. srfi-9 records vs. non-inlined vectors -- or -- anything faster than srfi-9?
Date: Sun, 9 Oct 2011 01:35:00 -0700

On Oct 8, 2011, at 6:40 PM, Matt Welland wrote:

> I'm in the habit of using inlined vector access for poor mans records:
> (define-inline (db:test-get-id           vec) (vector-ref vec 0))
> (define-inline (db:test-get-run_id       vec) (vector-ref vec 1))
> ....
> on the assumption that it is as fast as you can get. I'm converting some code 
> to units for faster build times and obviously inline doesn't work across 
> units so I looked at switching to srfi-9 records but they seem really slow. A 
> simple testcase gave me the following:
> vectors inline:        2.94s
> vectors not inline:  6.43s
> srfi-9 records:      14.16s
> Is there a faster record system to use? 

Someone has probably mentioned the 'record-variants' egg. The cost you are 
paying w/ srfi-9 (or 'defined-record') can be see using the expand macro 
facility of the csi.

> BTW, I'm not claiming the use of records will materially impact the 
> performance of my program but I don't see much advantage to records over what 
> I'm doing now and it seems that bad performance is always waiting around the 
> corner to bite me so why risk it?

I certainly commiserate but why worry about it until you must. Safety first ;-)

> _______________________________________________
> Chicken-users mailing list
> address@hidden

reply via email to

[Prev in Thread] Current Thread [Next in Thread]