Go HEP release 0.31.0

Release v0.31.0 is out of the oven.

This release contains no major API breakage, but all around improvements and bug fixes.

This release drops support for Go-1.16 (and earlier).

groot

• bump to ROOT-6.26/00
• implement a riofs Reader over HTTP(s), instead of downloading the whole file locally
• improve performances of rcmd.Dump(tree)
• add support for TMultiGraph
• add support for TDatime
• add support for TGraphMultiErrors
• add support for TProfile{,2D}
• add support for TEfficiency
• add support for TConfidenceLevel, TLimit{,DataSource}
• add support for TF1 and TFormula
• add support for reading std::vector<T, myalloc<T>>
• introduced a new package groot/rnpy, to ease ROOT/NumPy conversions (like groot/rarrow does for Arrow)
• improve memory usage of root2npy, by materializing into memory only one column at a time
• streamline C++ templates parsing for STL containers (vector,deque,map,unordered_{,multi}{map,set}, pair, …)

xrootd

• improve the read performances 10-fold, using a finer-grained lock to protect session IDs

AOB

That’s all for today. Last release we said there would probably be some work on the RNTuple front. We didn’t lie, but this didn’t happen in the form we thought it would. A surprise is in the works… stay tuned.

Next cycle will probably see some work on the RNTuple front, and that work appear in main.

Changelog

• b02724a1 all: bump x/crypto
• 6c359638 all: drop old +build foo stanza, use //go:build
• 24817699 all: bump klauspost/compress@v1.15.1 and pierrec/lz4@v4.1.14
• 59c6c675 all: bump gonum/gonum@v0.11.0, gonum/plot@v0.11.0
• c6f7c48c all: drop Go-1.16, add Go-1.18
• 7909cd7d groot/internal/httpio: add a pool of http.Request
• 0e0b9931 groot/riofs/plugin/http: first stab at a caching+concurrent http-reader
• 53a256f5 groot/internal/httpio: first import
• e6d5f90c groot: bump to ROOT-6.26/00
• 6f88941b xrootd: improve read performances 10-fold
• c38575f0 groot/rcmd: improve Dump tree performances
• ca83c453 groot/{internal/rtests,riofs}: better ACliC handling
• e453fa7c groot/{rcmd,rhist,rvers}: add support for TMultiGraph
• 17474123 groot/{rbase,riofs,rvers}: add support for TDatime
• 0034b01b groot/internal/rtests: make sure macros are run thru ACliC
• 0bd7c62e groot/{rcmd,riofs,rmeta}: add support for read std::vector<T,my_alloc>
• 551dabd7 groot/{rcmd,riofs}: add tests for more STL containers
• f1aa9058 groot/rtree: add rvar dispatch for map[K]V
• b4678544 groot/rdict: add r/w-streamer+type handling for TString
• 480971d2 groot/rdict: handle TString streaming in collections
• 22da5159 groot/rdict: use []T for disk storage of std::set
• 34d6347f groot/rdict: proper handling of ‘This’ streamers
• 0a85f502 groot: introduce rbytes.Header
• e16891db groot/rcmd: add tests for POD data files
• 2a344611 groot/rdict: generate RVersioner if not implemented
• d23d2f42 groot/{rdict,rmeta}: introduce CxxTemplate, streamline template parsing
• be7ddfa6 groot/rnpy: new package to ease ROOT-Tree/NumPy conversion
• 37a9ac0e cmd/root2npy: improve memory usage
• 04a2d5fc groot: streamline r/w buffer ops
• 1b25234f groot/{rdict,rhist,rvers}: add r/w support for TGraphMultiErrors
• 73b95060 groot/{rhist,riofs,rvers}: add r/w support for TProfile{,2D}
• 449e81e7 groot/rdict: add initial support for enums in genGoType
• e6f8d63d groot/{rcmd,rdict,rhist,rvers}: add r/w support for TEfficiency
• 929ec73d groot/rhist: add write support to TF1 and TFormula
• 129831f6 groot/{rcmd,rdict,rhist,riofs,rvers}: add r/w support for TConfidenceLevel and TLimit{,DataSource}
• ffc817e8 root/rbytes: add WriteStdVectorF64
• e488e92a root/rbytes: add WriteObject
• fa6827ea groot/{rdict,rhist,rvers}: add initial read support for TF1 and TFormula
• d8d3eb53 groot/rbytes: add RBuffer.ReadStdVectorI32
• 17373164 groot/rbytes: add RBuffer.ReadStdVectorF64
• ad66388a cmd/root2{arrow,csv,npy}: use riofs.Dir to retrieve trees