Async support in pupyarrow#66
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BlockCache: sorted interval cache that merges overlapping byte ranges. Designed for caching S3 range-read results. LazyBuffer: - enable_cache(readahead): activate block cache with configurable readahead - prepopulate(ranges): pre-fetch byte ranges into cache (sync) - async_prepopulate(ranges): parallel async variant - read_range() checks cache before hitting reader, fetches with readahead on miss Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
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