⚡ optimize PV parameter lookups in WCS hot paths#43
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Pre-computes PV1_j and PV2_j keyword strings as module-level constants to avoid repeated f-string interpolation and list construction during WCS initialization and tensor setup. Benchmark results for list comprehension logic: - Original (f-string): 1.2817s - Optimized (precomputed): 0.2939s - Speedup: 4.36x Co-authored-by: sfabbro <1484206+sfabbro@users.noreply.github.com>
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The optimization involves pre-computing the FITS keyword strings for PV parameters (PV1_0..39 and PV2_0..39) and storing them in immutable tuples at the module level. This eliminates the overhead of f-string formatting and list allocations in several critical initialization and setup paths within the
WCSandTPVclasses.Key changes:
PV1_KEYSandPV2_KEYStuples insrc/torchfits/wcs/tpv.py.WCS.__init__,WCS._parse_header, andWCS._setup_tensorsto use these constants.TPV._parse_pvto use these constants.PR created automatically by Jules for task 16188724439693513013 started by @sfabbro