Differences

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--- hepsim:files [2018/08/01 11:15]
hepsim17 [ProMC file format]
+++ hepsim:files [2018/08/30 01:07] (current)
hepsim17
@@ Line 11: / Line 11: @@
 It's efficient format for events with large number of particles.
 The file sizes for EVGEN files are typically 30% smaller than for traditional ROOT files (with fixed bytes for floats and integers).
-The file format is self-describing.
+The file format is self-describing. Suported by C++, Java/Jython (read/write), CPython.
 <fc #000080>
 Supported by: </fc>  hs-toolkit and Jas4PP
 ===== ProIO file format =====
-[[https://github.com/decibelcooper/proio | PROIO]] file format is used since 2018.
+[[https://github.com/proio-org/| PROIO]] file format is used since 2018.
 It is more efficient file format than ProMC when the number of events in the files larger than 64k,
-and when number of particles in files is not large. For Monte Carlo records, the files created by ProIO are about 10-20% smaller in size than those from ProMC. ProIO files can be used with C++, Python, Java/Jython, Go.
+and when number of particles in files is not large (<100). For the latter Monte Carlo records, the files created by ProIO are about 10-20% smaller in size than those from ProMC. ProIO files can be used with C++, Python, Java/Jython (only read), Go.
+For pp collision events with large number of particles, ProMC and ProIO have same file sizes when
+ProIO use mc.proto files with VarintPackedParticles messages (arrays with 4-momenta converted to varints).
+See some tests in http://atlaswww.hep.anl.gov/hepsim/info.php?item=326
 <fc #000080>