Best binary file viewer java
But again, the times are really short. So we covered the text files. If we compare the times between the first benchmark the same disk and this method between two disk , we can see that the times are almost the same, just a little slower for some methods. So let's watch the big binary files:. This time, the differences are impressive. The native and NIO Buffer methods are the fastest methods. This transfer is a lot faster than on the same disk.
I'm not sure of the cause of these results. The only reason I can found is that the operating system can made the two things at the same time, reading on the first disk and writing on the second disk. If someone has a better conclusion, don't hesitate to comment the post. Here are the results of the first version of this post. The first disk is always the same, but the second disk is a NTFS.
For concision, I removed some graphes. I've also removed the conclusion that are the same as the first two benchmarks. The native method is not covered in these results. The best two versions are the Buffered Streams and Buffered Readers. Here this is because the buffered streams and readers can write the file in only one operation.
Here the times are in microseconds, so there is really little differences between the methods. So the results are not really relevant. We can see that the versions with the Readers are a little slower than the version with the streams. This is because Readers works on character and for every read operation, a char conversion must be made, and the same conversion must be made on the other side.
The NIO buffer strategy is almost equivalent to custom buffer. And the direct transfer using NIO is here slower than the custom buffer methods. I think this is because here the cost of invoking native methods in the operating system level is higher than simply the cost of making the file copy.
Here, it's now clear that the custom buffer strategy is a better than the simple buffered streams or readers and that using custom buffer and buffered streams is really useful for bigger files.
You can see that it doesn't take ms to copy a 50 MB file using the custom buffer strategy and that it even doesn't take ms with the NIO Transfer method.
Really quick isn't it? We can see that for a big file, the NIO Transfer start to show an advantage, we'll better see that in the binary file benchmarks. We will directly start with a big file 5 MB for this benchmark:.
So we can make the same conclusion as for the text files, of course, the buffered streams methods is not fast. The other methods are really close.
We see that all the methods are really close, but the NIO Transfer method has an advantage of ms. I think it's logical because the operating system must made conversions. But the custom buffer strategy and the NIO Buffer too are also really fast methods to copy files. So perhaps, the best method is a method that make a custom buffer strategy on the little files and a NIO Transfer on the big ones and perhaps use the native executable on the really bigger ones.
But it will be interesting to also make the tests on an other computer and operating system. Here are the sources of the benchmark: File Copy Benchmark Version 3. Here are the informations complete for the benchmark between two disks: Complete results of first two benchmarks.
Toggle navigation Blog blog "Baptiste Wicht" ;. So I searched all the methods to copy a File in Java, even the bad methods and found 5 methods: Make the copy using the cp executable of Linux Naive Streams Copy: Open two streams, one to read, one to write and transfer the content byte by byte.
Open two readers, one to read, one to write and transfer the content character by character. Same as the first but using buffered streams instead of simple streams. Same as the second but using buffered readers instead of simple readers.
Custom Buffer Stream Copy: Same as the first but reading the file not byte by byte but using a simple byte array as buffer. Custom Buffer Reader Copy: Same as the fifth but using a Reader instead of a stream.
Custom Buffer Buffered Stream Copy: Same as the fifth but using buffered streams. Custom Buffer Buffered Reader Copy: Same as the sixth but using buffered readers. Using NIO Channel and direct transfer from one channel to other.
Path Java 7 Copy: Using the Path class of Java 7 and its method copyTo I think, this is the principal methods to copy a file to another file. For the benchmark, I made the tests using different files. I made the tests using in three modes: On the same hard disk. It's formatted in Ext4.
It's formatted using NTFS. I've cut the post into several pages due to the length of the post: There you can share ideas and experiences, ask for help, give us feedback, request new features or changes, discuss implementation, submit patches, or contribute code. Without subscribing to any lists, you can also search the archives that collect all messages posted to the lists. The Jmol application is a stand-alone Java application Jmol. It has all the capabilities of the JSmol applet but runs approximately times faster.
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