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healpy operations and noise sims benchmarks ran on Popeye, all time in seconds, ell_max 3*nside-1 except 4096 at 2*nside
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nside | IQU_alm_filesize | IQU_map_filesize | alm2map_I | alm2map_IQU | alm_size | lmax | map2alm_I | map2alm_IQU | npix | read_alm_IQU | read_map_IQU | noise_sim_init | noise_sim_run | |
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
128 | 4.4M | 2.3M | 0.0 | 0.0 | 73920 | 383 | 0.0 | 0.01 | 196608 | 0.02 | 0.02 | 0.19 | 0.04 | |
256 | 17M | 9.4M | 0.0 | 0.02 | 295296 | 767 | 0.01 | 0.03 | 786432 | 0.03 | 0.01 | 0.18 | 0.14 | |
512 | 70M | 37M | 0.02 | 0.09 | 1180416 | 1535 | 0.04 | 0.14 | 3145728 | 0.12 | 0.03 | 0.36 | 0.63 | |
1024 | 283M | 151M | 0.13 | 0.44 | 4720128 | 3071 | 0.19 | 0.67 | 12582912 | 0.47 | 0.12 | 1.05 | 2.63 | |
2048 | 1.1G | 603M | 0.77 | 2.83 | 18877440 | 6143 | 1.0 | 3.75 | 50331648 | 1.92 | 0.47 | 4.51 | 11.73 | |
4096 | 4.5G | 2.4G | 4.85 | 19.22 | 75503616 | 12287 | 5.86 | 23.79 | 201326592 | 7.71 | 1.89 | 18.62 | 55.13 | |
8192 | 8.0G | 9.6G | 17.3 | 68.25 | 134242305 | 16384 | 119.06 | 496.57 | 805306368 | 13.8 | 7.49 | 73.75 | 210.05 |
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consider that for 8192, we do not have pixel weights, so by default
healpy
does 3 iterations of the transform