add same layer test

[Gerdie]

• fixes bug where compositing 2 tilesets with the same layer names, but selecting different layers from each, would ignore the second tileset's layers even if the first tileset's layers were dropped.
• adds test for same layer names

Next steps:

• get PR approved
• release 0.5.1
• merge

[Gerdie]

test-same-layer-names benchmarks:

1: single tile in/out ... 33333 runs/s (30ms)
2: two different tiles at the same zoom level, zero buffer ... 5348 runs/s (187ms)
3: two different tiles from different zoom levels (separated by one zoom), zero buffer ... 1348 runs/s (742ms)
4: two different tiles from different zoom levels (separated by more than one zoom), zero buffer ... 2849 runs/s (351ms)
5: tiles completely made of points, overzooming, no properties ... 17544 runs/s (57ms)
6: tiles completely made of points, same zoom, no properties ... 100000 runs/s (10ms)
7: tiles completely made of points, overzoooming, lots of properties ... 12500 runs/s (80ms)
8: tiles completely made of points, same zoom, lots of properties ... 41667 runs/s (24ms)
9: buffer_size 128 - tiles completely made of points, same zoom, lots of properties ... 35714 runs/s (28ms)
10: tiles completely made of linestrings, overzooming and lots of properties ... 3003 runs/s (333ms)
11: tiles completely made of polygons, overzooming and lots of properties ... 641 runs/s (1559ms)
12: tiles completely made of points and linestrings, overzooming and lots of properties ... 24390 runs/s (41ms)
13: buffer_size 128 - tiles completely made of points and linestrings, overzooming and lots of properties ... 21277 runs/s (47ms)
14: tiles completely made of points and linestrings, overzooming (2x) and lots of properties ... 34483 runs/s (29ms)
15: tiles completely made of polygons, overzooming and lots of properties ... 2304 runs/s (434ms)
16: tiles completely made of polygons, overzooming (2x) and lots of properties ... 4878 runs/s (205ms)
17: buffer_size 4096 - tiles completely made of polygons, overzooming (2x) and lots of properties ... 2326 runs/s (430ms)
18: single tile, dropping layers ... 33333 runs/s (30ms)

master benchmarks:

1: single tile in/out ... 34483 runs/s (29ms)
2: two different tiles at the same zoom level, zero buffer ... 5000 runs/s (200ms)
3: two different tiles from different zoom levels (separated by one zoom), zero buffer ... 1391 runs/s (719ms)
4: two different tiles from different zoom levels (separated by more than one zoom), zero buffer ... 2874 runs/s (348ms)
5: tiles completely made of points, overzooming, no properties ... 17241 runs/s (58ms)
6: tiles completely made of points, same zoom, no properties ... 100000 runs/s (10ms)
7: tiles completely made of points, overzoooming, lots of properties ... 12346 runs/s (81ms)
8: tiles completely made of points, same zoom, lots of properties ... 41667 runs/s (24ms)
9: buffer_size 128 - tiles completely made of points, same zoom, lots of properties ... 40000 runs/s (25ms)
10: tiles completely made of linestrings, overzooming and lots of properties ... 3049 runs/s (328ms)
11: tiles completely made of polygons, overzooming and lots of properties ... 641 runs/s (1561ms)
12: tiles completely made of points and linestrings, overzooming and lots of properties ... 24390 runs/s (41ms)
13: buffer_size 128 - tiles completely made of points and linestrings, overzooming and lots of properties ... 23256 runs/s (43ms)
14: tiles completely made of points and linestrings, overzooming (2x) and lots of properties ... 23810 runs/s (42ms)
15: tiles completely made of polygons, overzooming and lots of properties ... 2294 runs/s (436ms)
16: tiles completely made of polygons, overzooming (2x) and lots of properties ... 4831 runs/s (207ms)
17: buffer_size 4096 - tiles completely made of polygons, overzooming (2x) and lots of properties ... 2336 runs/s (428ms)
18: single tile, dropping layers ... 38462 runs/s (26ms)

[Gerdie]

Updated api-vt staging with this dev release and the results look good:

https://hey.mapbox.com/xray-debug/?left=mapbox.auto-v1-stg@staging&right=mapbox.auto-v1@staging#14.11/37.36897/-121.93409

https://hey.mapbox.com/xray-debug/?left=mapbox.auto-v1-stg@staging&right=mapbox.mapbox-streets-v8@staging#16.49/36.668135/-121.660975

[manoharuss]

I verified the xray-debug tilesets side by side and confirmed the road date in auto-v1-stg is coming from auto-v1 correctly @Gerdie.

frc is a auto-v1 only property. Other Auto-v1 layers like poi_label look correct too. Thanks for unblocking us 🙇