geo-engine / geoengine / 40727935773

88%

Build Type

push

github

Committed by web-flow

Commit Message

perf: make empty tiles less work (#1360)

* feat(backend): make tiles without data cheaper

- convert all-no-data GDAL reads to empty tiles on the server side of the IPC payload conversion
- skip sub-queries outside of the source's data bounds in `RasterSubQueryAdapter`
- skip reading windows that are missing in sparse files (`GDALGetDataCoverageStatus`) in the GDAL worker, if GDAL would fill them with no-data anyway
- read the mask flags before the data, which saves a header request on read retries

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

* test(backend): add a benchmark for tiles without data

The `no_data_tiles` bench is not part of the CI benchmarks. Besides local NDVI cases, it can run Sentinel-2 cases against a COG given by `NO_DATA_BENCH_COG`.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

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Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>

Coverage Stats

254 of 257 new or added lines in 5 files covered. (98.83%)

10 existing lines in 1 file now uncovered.

136255 of 155228 relevant lines covered (87.78%)

540455.87 hits per line