perf(geotiff)!: block-aligned LRU header cache; lazy tile metadata#529

Merged

kylebarron merged 12 commits into

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kyle/cog-block-cache

May 12, 2026

Commits on May 12, 2026

docs: spec for COG block-aligned header cache

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claude
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refactor(geotiff): drop eager TileOffsets/TileByteCounts prefetch

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feat(geotiff): disable cogeotiff leader-bytes path so header cache stays metadata-only

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feat(geotiff)!: 64 KiB block-aligned LRU header cache in fromUrl

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test(geotiff): integration test for block-aligned header cache

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refactor(geotiff): rename source -> dataSource in tile-fetch path; explicit one-block prefetch

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feat(geotiff): opt-in debug option to log dataSource fetches

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update issue link
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clean up vt example
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refactor(geotiff)!: drop redundant prefetch option from GeoTIFF.open

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fix(geotiff): make HasTiffReference.debug optional

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refactor(geotiff): make debug field internal (_debug) and drop Overview accessor

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