SeaSloth — Regridding

xESMF/ESMF weight generation + apply cost, one-time snapshot on Derecho/GLADE. · Raw data (JSON)

Regridding cost — source size × destination size → time

145.8 µs → 9.38 s (log scale)

Grid → grid

Rows: source grid size. Columns: destination grid size. bilinear method, single timestep.

xESMF — weight generation

	150×150	400×300	700×350
300×300	608.5 ms	1.58 s	2.65 s
800×600	2.55 s	4.04 s	5.43 s
1500×700	5.75 s	7.32 s	9.38 s

ESMF — weight generation

	150×150	400×300	700×350
300×300	607.6 ms	1.47 s	2.56 s
800×600	2.41 s	3.64 s	4.87 s
1500×700	5.12 s	6.65 s	7.92 s

xESMF — apply

	150×150	400×300	700×350
300×300	5.1 ms	26.6 ms	53.8 ms
800×600	5.0 ms	25.1 ms	50.5 ms
1500×700	5.0 ms	24.9 ms	50.6 ms

ESMF — apply

	150×150	400×300	700×350
300×300	145.8 µs	447.9 µs	854.1 µs
800×600	148.3 µs	512.0 µs	906.9 µs
1500×700	151.0 µs	557.7 µs	1.1 ms

Grid → boundary (OBC pattern)

Rows: source grid size. Columns: number of boundary points. bilinear method, single timestep.

xESMF — weight generation (OBC boundary)

	1K	10K	100K
300×300	353.6 ms	415.9 ms	1.07 s
800×600	2.07 s	2.12 s	2.94 s
1500×700	4.70 s	4.76 s	5.52 s

xESMF — apply (OBC boundary)

	1K	10K	100K
300×300	751.6 µs	2.7 ms	22.2 ms
800×600	748.0 µs	2.7 ms	22.2 ms
1500×700	738.1 µs	2.6 ms	22.2 ms