[DRAFT PR] Possible dust map implementation

[jeremykubica]

Draft PR to ask if this is the direction we want to go.

[github-actions]

Before [9ea64af]	After [36dfa37]	Ratio	Benchmark (Parameter)
1.64±0.1ms	1.36±0.09ms	~0.83	benchmarks.TimeSuite.time_apply_passbands
723±500μs	761±500μs	1.05	benchmarks.TimeSuite.time_fnu_to_flam
120±1μs	122±1μs	1.02	benchmarks.TimeSuite.time_sample_x0_from_distmod
4.45±1ms	4.48±0.1ms	1.01	benchmarks.TimeSuite.time_chained_evaluate
15.7±0.2μs	16.0±0.1μs	1.01	benchmarks.TimeSuite.time_sample_x1_from_hostmass
8.55±0.7ms	8.47±0.8ms	0.99	benchmarks.TimeSuite.time_evaluate_salt3_model
4.73±0.2ms	4.68±0.2ms	0.99	benchmarks.TimeSuite.time_evaluate_salt3_passbands
8.95±0.1ms	8.85±0.03ms	0.99	benchmarks.TimeSuite.time_load_passbands
28.1±0.9μs	27.9±0.3μs	0.99	benchmarks.TimeSuite.time_make_new_salt3_model
1.33±0.01s	1.31±0.01s	0.98	benchmarks.TimeSuite.time_make_x1_from_hostmass

Click here to view all benchmarks.