Blog of Dave

Benchmarks revisited

Posted : Jan 30, 2006 12:00 AM

ColdFusion

After my last blog post regarding performance differences between various functions and between accessing them with cfscript vs. tag based calls, I got an email from reader Robert Froehling, who said the following:

Your article, Benchmarks - try VS isdefined() & script VS tag, got me thinking about how the various functions, that can be used to determine a variables existence or value, perform. So I decided to do a little testing myself. I setup the tests almost exactly the way you did, just using different functions. I used Len(), IsDefined(), Compare(), and StructKeyExists(). Personally, I've been using Len() for a while now. Obviously, it requires you to use <cfparam> for all of the potential variables. But this doesn't bother me much. I ran each test 10 times to come up with an average. It turned out that Len() and Compare() using <cfscript> are the leaders at an average of 60 milliseconds. Attached are my results.

Just thought I'd share.

Fro

It appears that his tests too seem to add weight to cfscript being notably faster on the functions he tested.

With his permission to share, here are his results:

	Len()		IsDefined()		Compare()		StructKeyExists()
	Block	Script	Block	Script	Block	Script	Block	Script
1	547	156	469	140	344	140	265	187
2	172	250	172	219	125	219	344	235
3	125	31	172	79	125	32	203	110
4	125	16	172	78	125	31	203	109
5	125	16	171	94	141	31	203	109
6	125	31	171	79	125	31	203	110
7	141	31	172	79	110	31	203	109
8	125	31	172	78	109	16	203	109
9	125	15	156	78	109	31	204	109
10	109	31	172	79	109	31	203	94
Average	171.9	60.8	199.9	100.3	142.2	59.3	223.4	128.1