Are Java static calls more or less expensive than non-static calls?

java performance premature-optimization
Andy Faibishenko picture Andy Faibishenko · Sep 27, 2010 · Viewed 45.7k times · Source

Is there any performance benefit one way or another? Is it compiler/VM specific? I am using Hotspot.

Answer

Anon picture Anon · Sep 27, 2010

First: you shouldn't be making the choice of static vs non-static on the basis of performance.

Second: in practice, it won't make any difference. Hotspot may choose to optimize in ways that make static calls faster for one method, non-static calls faster for another.

Third: much of the mythos surrounding static versus non-static are based either on very old JVMs (which did not do anywhere near the optimization that Hotspot does), or some remembered trivia about C++ (in which a dynamic call uses one more memory access than a static call).

Related questions

Which "if" construct is faster - statement or ternary operator?

There are two types of if statements in java - classic: if {} else {} and shorthand: exp ? value1 : value2. Is one faster than the other or are they the same? statement: int x; if (expression) { x = 1; } else { x = 2; } ternary operator: int …

Read More
Java: Performance of Enums vs. if-then-else

I've had no real luck getting a concise answer for this comparison by using Google and rather than do my own time consuming evaluations, I thought I would ask first. I'm fairly sure that a switch statement using Enums would …

Read More
Is ++i really faster than i++ in for-loops in java?

In java I usually make a for-loop like following: for (int i = 0; i < max; i++) { something } But recently a colleague typed it so: for (int i = 0; i < max; ++i) { something } He said the latter would be faster. Is …

Read More