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String parsing significantly slower in Lucee than in OpenBD

Description

As per described in Lucee developer forums, we found out after switching to Lucee that some of our existing functions that did tons of Replace() and other string functions were extremely slow compared to their execution on OpenBD (even with slower hardware).

This isn't exactly a measurable difference in isolated case, but the function in case was repeated several times in some templates - and those templates were the only ones throwing timeouts to our error logs. Once we replaced the custom function (a customized datetimeformat function replacement) with system's own such function, all the timeouts we have had over the past 14 months, disappeared.

The function had just lots of replaces, nothing more complicated than that and the string it took in, was a short one, basically a date mask:

Short clip from the function:

... <cfset maski=Replace(maski, "January", "tammikuuta", "ALL")> <cfset maski=Replace(maski, "February", "helmikuuta", "ALL")> <cfset maski=Replace(maski, "March", "maaliskuuta", "ALL")> <cfset maski=Replace(maski, "April", "huhtikuuta", "ALL")> <cfif isdefined("kolme")> <cfset maski=Replace(maski, "May", "tou", "ALL")> <cfelse> <cfset maski=Replace(maski, "May", "toukokuuta", "ALL")> </cfif> <cfset maski=Replace(maski, "June", "kes&auml;kuuta", "ALL")> <cfset maski=Replace(maski, "July", "hein&auml;kuuta", "ALL")> <cfset maski=Replace(maski, "August", "elokuuta", "ALL")> <cfset maski=Replace(maski, "September", "syyskuuta", "ALL")> <cfset maski=Replace(maski, "October", "lokakuuta", "ALL")> <cfset maski=Replace(maski, "November", "marraskuuta", "ALL")> <cfset maski=Replace(maski, "December", "joulukuuta", "ALL")> <cfset maski=Replace(maski, "Jan", "tam", "ALL")> <cfset maski=Replace(maski, "Feb", "hel", "ALL")> <cfset maski=Replace(maski, "Mar", "maa", "ALL")> <cfset maski=Replace(maski, "Apr", "huh", "ALL")> <cfset maski=Replace(maski, "Jun", "kes", "ALL")> <cfset maski=Replace(maski, "Jul", "hei", "ALL")> <cfset maski=Replace(maski, "Aug", "elo", "ALL")> <cfset maski=Replace(maski, "Sep", "syy", "ALL")> <cfset maski=Replace(maski, "Oct", "lok", "ALL")> <cfset maski=Replace(maski, "Nov", "mar", "ALL")> <cfset maski=Replace(maski, "Dec", "jou", "ALL")> ...

Now, I suspect that by switching from Lucee's internal Replace() to Java's replace functions on other site areas might improve performance there, too..

Suggest you look into this, even tho it might seem insignificant.

Environment

CentOS / Tomcat

Activity

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Michael Offner 21 March 2019 at 17:48

we do not use the replace function coming from java String, because they support regex and are because of that incompatible and slower. we will do some testing to find out what makes them slow, actually we have spend a lot of time to make this function as fast as possible winking face

Zac Spitzer 21 March 2019 at 15:58

there's an ongoing discussion about on the mailing list

Zac Spitzer 21 March 2019 at 11:39

Zac Spitzer 21 March 2019 at 11:33

Fixed

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Affects versions

Created 21 March 2019 at 11:02
Updated 21 May 2024 at 19:36
Resolved 21 May 2024 at 19:36

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