通过套接字将数据从C ++程序移植到Java程序的输入是否比通过服务器上的原始json或xml文件更快？

Question

What's the best way to go about things in terms of speed/performance?

Where do things like "Apache Thrift" come in and what are the benefits?

Please add some good resources I can use to learn about any recommendations!

Thanks all

Answer 1

Presuming you mean both processes are already running, then it's going to be via sockets.

Writing a file to the disk from one process then reading it from the other is going to incur the performance hit of the disk write and read (and of course whatever method you employ to keep the reader from accessing the file until it's done being written; either locks or an atomic rename on the disk).

Even ignoring that, your localhost interface is going to have a faster transfer rate than your disk controller, with the possible exception of a 10Gb fiber channel RAID array with 15k RPM drives in it.

Answer 2

Try it out. There's just no other way to find out.

Using sockets or the file system should be comparably fast, since both methods rely on some system calls that are very similar.

Always be aware that this communication involves these steps:

1. Encoding your data to a stream of bytes (JSON, XML, YAML, X.509 DER, Java Serialization)
2. Transferring this stream of bytes (TCP socket, UNIX socket, filesystem, ramdisk, pipes)
3. Decoding the stream of bytes into data (same as step 1)

Step 1 and 2 are completely independent, so take that into account when you benchmark.