https://issues.apache.org/bugzilla/show_bug.cgi?id=45651
Summary: Enhance performance of Project.fireMessageLoggedEvent
Product: Ant
Version: unspecified
Platform: PC
OS/Version: Windows XP
Status: NEW
Severity: normal
Priority: P2
Component: Core
AssignedTo: [email protected]
ReportedBy: [EMAIL PROTECTED]
Created an attachment (id=22454)
--> (https://issues.apache.org/bugzilla/attachment.cgi?id=22454)
Source of the simple benchmark I did to compare iterations
When running a big build under a profiler, I notice that 7% of the time of my
build is spent in the method Project.fireMessageLoggedEvent, even when tracing
is disabled.
This method actually loop on a Vector of listener every time a debug call is
done.
Using an other data structure to store the listeners would be much more
performant.
I benchmarked looping on a Vector, on an ArrayList and a native array and the
result on an ibm 1.5 jvm is :
Vector loop ellapsed time (ms): 255.917905
ArrayList loop ellapsed time (ms): 136.867966
Native array loop ellapsed time (ms): 10.323511 (there is probably also a gain
for the gc)
So storing the list of listeners directly in a native array would boost this
method by a factor 20.
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