Log of /trunk/tree/tree/src/TBasketSQL.cxx
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44507 -
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Modified
Mon Jun 4 12:30:41 2012 UTC (2 years, 7 months ago) by
axel
File length: 5296 byte(s)
Diff to
previous 43518
Remove
using namespace std;
from Riostream.h, which has huge consequences for all of ROOT.
Riostream.h is now a simple wrapper for fstream, iostream, iomanip for backward compatibility; Riosfwd.h simply wraps iosfwd.
Because of templates and their inline functions, Riostream.h needed to be included in headers, too (e.g. TParameter.h), which violated the assumption that Riostream.h is not exposing its using namespace std to headers.
ROOT now requires R__ANSISTREAM, R__SSTREAM, which does not change the set of supported compilers.
Without "using namespace std", several identifiers are now prefixed by std::; e.g. roofit/* source files now have a using namespace std to keep their coding style.
TFile::MakeProject() now generates "using namespace std" to convert the CINT-style class names into C++ ones.
Revision
38801 -
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Modified
Mon Apr 11 20:10:24 2011 UTC (3 years, 9 months ago) by
pcanal
File length: 5248 byte(s)
Diff to
previous 38233
Reduce by 40% the time taken GetEntry for a branch created using a leaflist (exclusive of the decompression time).
Cache the current basket and its limit.
Reorder the set of test to reduce the number of conditional jump in the most common cases
and use:
#define unlikely(expr) __builtin_expect(!!(expr), 0)
#define likely(expr) __builtin_expect(!!(expr), 1)
to tell the compiler/processor which branch is more likely.
Record whether the buffer's map of classname and object is used to avoid resetting unnecessarily at read time.
Revision
38233 -
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Modified
Fri Feb 25 20:26:33 2011 UTC (3 years, 10 months ago) by
pcanal
File length: 5240 byte(s)
Diff to
previous 35236
Avoid creating the unnecessary array fEntryOffset ... which when its content is always set to zero actually prevent reading text field with TTreeSQL
Revision
35231 -
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Modified
Fri Sep 10 17:59:10 2010 UTC (4 years, 4 months ago) by
pcanal
File length: 5511 byte(s)
Diff to
previous 22902
Dramatically reduce the amount of memory allocation induces by the management of the TBasket and TBuffer
for each branch. Instead of creating one TBasket object and one TBuffer object and its associated memory buffer
for each onfile basket of each branch, we now create only one TBasket and one TBuffer object for the lifetime of
each branch. The memory buffer associated with the TBuffer object is also created once and rarely reallocated;
it is reallocated only when the buffer size is reset (for example by the AutoFlush mechanism) and when the user
object do not fit in the currently allocated memory (but we do not shrink it after that. The same minization
is applied to the scratch area used to read the compressed version of a basket from the file.
In TBasket introduce new data member fCompressedBuffer and fCompressedSize to keep track of the scratch memory
area used to read compressed data from the file (Even though we already have fBufferRef and fBuffer from TKey,
they are too tied together to properly used in the case of long live TBasket).
Add a TBasket::Reset member function to return the basket to its original 'unread' or 'unfilled' state.
Add TBranch::GetFreshBasket to factor out the code deciding whether to create a new TBasket object or
to reuse an existing one.
Revision
12483 -
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Added
Mon Aug 15 21:29:58 2005 UTC (9 years, 5 months ago) by
pcanal
Original Path:
trunk/tree/src/TBasketSQL.cxx
File length: 5186 byte(s)
First version of TTreeSQL facility.
This allow the storing and restoring of TTree into an SQL database
TSQLServer *dbserver = TSQLServer::Connect("mysql://localhost:3306/rootDev","rootdevel", "r00tg6ys");
dbserver->Query("drop table ntuple;");
ntuple = new TTreeSQL(dbserver, "rootDev", "ntuple");
If the database contain a table named ntuple, this will connect to it
and let you use any of TTree functionality on (Scan, Draw, etc.)
If the database does not contain a table named ntuple, it will created
once you called the first Fill on the TTree.
This version supports the leaflist type of branches.
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