[lkdvos]

SUNRepresentations.jl v0.5.0

This release makes the order of ⊗ deterministic and caches CGCs, F- and R-symbols with MemoizationKit. It also makes ⊗, Nsymbol and dim much faster.

Breaking changes

• s1 ⊗ s2 now returns the irreps in sorted (isless) order. That is the same order as values(SUNIrrep{N}). The old order depended on hash(::SUNIrrep), so it changes once: tensor data stored with the old fusion tree layout must be converted. (Sort ⊗ output and speed up Nsymbol and ⊗ #58, fixes Order of ⊗ depends on hash(::SUNIrrep), which makes the data layout of SU(N) tensors depend on hash #54)
• The disk cache of Clebsch-Gordan coefficients now uses MemoizationKit's SQLite cache instead of JLD2 files. Set its location, and whether it is used, with MemoizationKit preferences. use_disk_cache, cgc_cache_dir and clear_disk_cache! are removed. precompute_disk_cache and cache_info remain. CGCs cached by earlier versions are not reused. (Cache CGCs, F- and R-symbols and direct products with MemoizationKit #59)
• SQLite replaces JLD2, Pidfile, Scratch and LRUCache as dependencies. (Cache CGCs, F- and R-symbols and direct products with MemoizationKit #59)

Performance

• ⊗ and Nsymbol use a pruned Littlewood-Richardson enumeration, which is much faster for large irreps. (Sort ⊗ output and speed up Nsymbol and ⊗ #58)
• dim uses integer arithmetic instead of Rational, which makes it about 20× faster. It throws an error if the dimension does not fit in an Int. (Compute dim in integer arithmetic #56)
• Lookups of cached F- and R-symbols no longer take a lock, so TensorKit no longer serializes on them across threads. CGCs on disk are stored in a compact format of their own, a third smaller and 7× faster to read than with Serialization. (Cache CGCs, F- and R-symbols and direct products with MemoizationKit #59)
• Static unbounded sizes in the SU(N) Manhattan indexing. (Static unbounded sizes in the SU(N) Manhattan indexing #60)

Fixed

• README usage example for an explicit SUNIrrep rank. (Fix README usage example for explicit SUNIrrep rank #55)

Full Changelog: v0.4.1...v0.5.0

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[leburgel]

No changes does make things very easy to review.

[lkdvos]

It's more about whether the notes are good and if we are still missing things, but yes 😂