Performance of BufferedOutputStream.write() 2005-01-07 - By Frans Verhoef
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>?The reason I ask is that I don't want to fix it (i.e. implement
>?your solution) if all I will get is a 5% performance improvement.
>?I'm in need of a >2x performance benefit :(
I did a little test myself, transferring a file (about 300kb) from one harddisk
to another using both methods. Method1 first loading the whole file, before
streaming it to the new location, and method2 streams to the new location while
streaming in from the file.
Method2 finishes the transfer consistently in 12-14 micro seconds. In about
half the times method 1 also finishes in 12-14 micro seconds. However, the
other times it can take as long as 90 microseconds.
Probably the reason behind it is that due to the big amounts of data you keep
on loading into the virtual machine, the garbage collector needs more time to
clear the heap.
Maybe you could try to make a little test servlet to test the two different
methods in a servlet environment.
Hope its helpful.
Frans
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