CODEWITHSUNDEEP
javaperformance
pankajt
pankajt

Reputation: 7864

Vast difference in Java Performance from 1.4 to 1.6

I have observed a great difference in Sun Java performance when code is compiled through jdk1.6 as compared to jdk1.5 or jdk1.4 (over 4 folds)

What changes and optimizations have been done? Is there anything worth taking home from these changes which will help to boost our application performance.

Thanks for replying

Upvotes: 2

Views: 1915

Answers (3)

C. K. Young
C. K. Young

Reputation: 223023

See: Java SE 6 Performance White Paper.

Upvotes: 5

erickson
erickson

Reputation: 269687

You might be interested in a recent Java Posse interview with engineers from AMD. They talk about advances in machine architecture and HotSpot over the last few years. They also discuss some benchmarks that match your observations.

The "take-away" from these engineers was that developers can best help HotSpot do its magic by following common idioms and writing straightforward code. Clever optimizations by a developer that work in one release might prevent HotSpot from doing much better optimization in a later version.

Upvotes: 3

Michael Myers
Michael Myers

Reputation: 191925

The Java SE 6 Performance White Paper and/or the J2SE 5.0 Performance White Paper may answer your questions.

Upvotes: 2

Related Questions