I work on www.webEbenezer.net. I noticed today that Robert Ramey said "So far so good" regarding some performance tests he is doing. You might want to encourage him to consider some of the competition as far as performance.
Some recent tests I've done that compare Ebenezer Enterprises and Boost.serialization's performance show the Boost.serialization approach to be 7 to 9 times slower than the Ebenezer Enterprises approach. I'm using Linux 2.6.12, gcc 4.0.2 (with -O3) and a Boost.serialization library from the release tree. A test that compared the times to serialize/send a list<int> took 7.4 times longer with Boost than Ebenezer. I timed the following Boost: oArch & lst; // oArch is a binary_oarchive
Ebenezer: msgs.Send(buffer, lst); // In order to compare apples to apples, // I removed a section of code at the end
// of the Send function that flushes the buffer.
In a second test I added a deque of int... Boost: oArch & lst; oArch & dq; // std::deque<int> dq;
Ebenezer: msgs.Send(buffer, lst, dq);
In this case Boost took 9.1 times longer than Ebenezer Enterprises approach. If you want to run these tests with other compilers I think that would be helpful. I've been warned not to put too much emphasis on numbers from gcc.
I've written a test program to compare the time required by boost serialization to the time required by using stream i/o to do a similar operation. I've only used VC 7.1 (release mode) and my focus has been to try to determine how much overhead the serialization system adds compared to the alternative of not using it. The test consists for saving/loading 1000 instances of a class which includes all primitive types (? about 20 members including strings). Times are calculated by dividing the total time by 1000 to give ms / operaton. These preliminary results don't raise any major red flags. I'm still working on this in my spare time. A couple of problems are: a) timings are too crude. b) I need to make a standard library test which writes/read binary data. This is interesting for comparison purposes, though I doubt many people actually use output/input streams in this way. c) I'm aware that there are couple of opportunities for improved performance in the archive implementation. d)I really want to get profile data from this (improved) test. I'm having some problems because not all plaforms support profiling and I'm having some problems figuring out how to work into bjam in the way I want. e)If I've got nothing else to do, I might want to enhance this with tests of some stl collections. Note that the compiled version of the attached program using the static library of the serialization library and the DLL version of the VC C++ runtime library is 268K. Given what we're serializing to three different archives, including xml, this seems like a very reasonable number to me. Below are a couple of test runs. Robert Ramey standard library write to file 0.047ms read from file 0.016ms binary_archives save archive 0ms save archive through pointer 0.015ms load archive 0.016ms load archive through pointer 0.016ms text_archives save archive 0.062ms save archive through pointer 0.047ms load archive 0.046ms load archive through pointer 0.079ms xml_archives save archive 0.11ms save archive through pointer 0.156ms load archive 0.187ms load archive through pointer 0.203ms *** No errors detected Running 1 test case... standard library write to file 0.062ms read from file 0.016ms binary_archives save archive 0.016ms save archive through pointer 0.015ms load archive 0.016ms load archive through pointer 0.031ms text_archives save archive 0.094ms save archive through pointer 0.078ms load archive 0.078ms load archive through pointer 0.093ms xml_archives save archive 0.125ms save archive through pointer 0.141ms load archive 0.172ms load archive through pointer 0.219ms *** No errors detected Press any key to continue Running 1 test case... standard library write to file 0.047ms read from file 0ms binary_archives save archive 0.016ms save archive through pointer 0.015ms load archive 0ms load archive through pointer 0.016ms text_archives save archive 0.063ms save archive through pointer 0.062ms load archive 0.063ms load archive through pointer 0.093ms xml_archives save archive 0.125ms save archive through pointer 0.157ms load archive 0.187ms load archive through pointer 0.219ms *** No errors detected Press any key to continue begin 666 test_overhead.cpp M+R\O+R\O+R\O,2\O+R\O+R\O+S(O+R\O+R\O+R\S+R\O+R\O+R\O-"\O+R\O M+R\O+S4O+R\O+R\O+R\V+R\O+R\O+R\O-R\O+R\O+R\O+S@-"B\O('1E<W1? 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