openvax / isovar / 24490429886

93%

master: 94%

Pull #155

github

Cache VariantSequence.coverage() to avoid redundant recomputation

coverage() iterates over all reads and builds a numpy array each call.
Since VariantSequence is immutable (reads is a frozenset), the result
is cached in a _coverage_cache slot after first computation. The cache
slot is excluded from _fields so it doesn't affect __eq__ or __hash__.

Two new tests verify the caching and that it doesn't break equality.

Fixes #149

6 of 6 new or added lines in 2 files covered. (100.0%)

2054 of 2207 relevant lines covered (93.07%)

2.79 hits per line