improve memory allocation strategy in lhe blob compression

[bendavid]

Small improvement to memory handling with respect to
#8244

[bendavid]

+1

[cmsbuild]

This pull request is fully signed and it will be integrated in one of the next CMSSW_7_5_X IBs unless changes or unless it breaks tests. This pull request requires discussion in the ORP meeting before it's merged. @davidlange6, @nclopezo, @ktf, @smuzaffar

[cmsbuild]

-1
Tested at: e17afc5
I found a compilation error while trying to compile with clang:

In file included from /afs/cern.ch/cms/sw/ReleaseCandidates/vol1/slc6_amd64_gcc491/cms/cmssw/CMSSW_7_5_X_2015-03-13-1400/src/DataFormats/TrajectoryState/interface/LocalTrajectoryParameters.h:7:
In file included from /afs/cern.ch/cms/sw/ReleaseCandidates/vol1/slc6_amd64_gcc491/cms/cmssw/CMSSW_7_5_X_2015-03-13-1400/src/DataFormats/Math/interface/AlgebraicROOTObjects.h:13:
In file included from /afs/cern.ch/cms/sw/ReleaseCandidates/vol1/slc6_amd64_gcc491/lcg/root/5.34.22-cms3/include/Math/SVector.h:367:
In file included from /afs/cern.ch/cms/sw/ReleaseCandidates/vol1/slc6_amd64_gcc491/lcg/root/5.34.22-cms3/include/Math/BinaryOperators.h:22:
In file included from /afs/cern.ch/cms/sw/ReleaseCandidates/vol1/slc6_amd64_gcc491/lcg/root/5.34.22-cms3/include/Math/BinaryOpPolicy.h:22:
/afs/cern.ch/cms/sw/ReleaseCandidates/vol1/slc6_amd64_gcc491/lcg/root/5.34.22-cms3/include/Math/MatrixRepresentationsStatic.h:176:24: fatal error: recursive template instantiation exceeded maximum depth of 256
      typedef typename make_indices_impl,
                       ^
/afs/cern.ch/cms/sw/ReleaseCandidates/vol1/slc6_amd64_gcc491/lcg/root/5.34.22-cms3/include/Math/MatrixRepresentationsStatic.h:176:24: note: in instantiation of template class 'ROOT::Math::rowOffsetsUtils::make_indices_impl<248, ROOT::Math::rowOffsetsUtils::indices<0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97, 98, 99, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111, 112, 113, 114, 115, 116, 117, 118, 119, 120, 121, 122, 123, 124, 125, 126, 127, 128, 129, 130, 131, 132, 133, 134, 135, 136, 137, 138, 139, 140, 141, 142, 143, 144, 145, 146, 147, 148, 149, 150, 151, 152, 153, 154, 155, 156, 157, 158, 159, 160, 161, 162, 163, 164, 165, 166, 167, 168, 169, 170, 171, 172, 173, 174, 175, 176, 177, 178, 179, 180, 181, 182, 183, 184, 185, 186, 187, 188, 189, 190, 191, 192, 193, 194, 195, 196, 197, 198, 199, 200, 201, 202, 203, 204, 205, 206, 207, 208, 209, 210, 211, 212, 213, 214, 215, 216, 217, 218, 219, 220, 221, 222, 223, 224, 225, 226, 227, 228, 229, 230, 231, 232, 233, 234, 235, 236, 237, 238, 239, 240, 241, 242, 243, 244, 245, 246, 247>, 289>' requested here
      typedef typename make_indices_impl,
                       ^


you can see the results of the tests here:
https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-8279/3421/summary.html

[cmsbuild]

This pull request is fully signed and it will be integrated in one of the next CMSSW_7_5_X IBs unless changes (but tests are reportedly failing). This pull request requires discussion in the ORP meeting before it's merged. @davidlange6, @nclopezo, @ktf, @smuzaffar

[cmsbuild]

+1
Tested at: e17afc5
https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-8279/3429/summary.html

[cmsbuild]

This pull request is fully signed and it will be integrated in one of the next CMSSW_7_5_X IBs unless changes (tests are also fine). This pull request requires discussion in the ORP meeting before it's merged. @davidlange6, @nclopezo, @ktf, @smuzaffar

[davidlange6]

+1