Speed of C++ compared with speed of other languages (was: Exception Misconceptions: Exceptions are for unrecoverable errors.)
Branimir Maksimovic <bmaxa@hotmail.com> writes:
Refcounts are negligible in comparison to what gc is doing.
GC cannot be efficient since it cannot access program
?[A]llocation in modern JVMs is far faster than the best
performing malloc implementations. The common code path
for new Object() in HotSpot 1.4.2 and later is
approximately 10 machine instructions (data provided by
Sun; see Resources), whereas the best performing malloc
implementations in C require on average between 60 and 100
instructions per call (Detlefs, et. al.; see Resources).
And allocation performance is not a trivial component of
overall performance -- benchmarks show that many
real-world C and C++ programs, such as Perl and
Ghostscript, spend 20 to 30 percent of their total
execution time in malloc and free -- far more than the
allocation and garbage collection overhead of a healthy
Java application (Zorn; see Resources).?
http://www-128.ibm.com/developerworks/java/library/j-jtp09275.html?ca=dgr-jw22JavaUrbanLegends
I don;t want to discuss this, but it is obvious that nothing in java is
designed with performance in mind. Quite opposite....
Java 1.6 (aka ?Java 6?) is already one of the fastest languages:
http://shootout.alioth.debian.org/gp4/benchmark.php?test=all&lang=all
And Java 1.7 (aka ?Java 7?) is reported to be even faster:
?Java 5 <=== 18% faster=== < Java 6 < ===46% faster===< Java 7?
http://www.taranfx.com/blog/java-7-whats-new-performance-benchmark-1-5-1-6-1-7
See also:
http://www.stefankrause.net/wp/?p=9
http://paulbuchheit.blogspot.com/2007/06/java-is-faster-than-c.html
http://www.idiom.com/~zilla/Computer/javaCbenchmark.html