Speed of Snr

For a Snr with 16x16 MPI tasks for 5 days. Jnr has 32x16 MPI tasks. %s compared to ATMOS only (ran in 1,209s).

Components % extra
What can be removed from Snr
Chemistry scheme/UKCA_MAIN1 (+4,878s*)+400%
Advection of UKCA fields/EG_CORRECT_TRACERS_UKCA (+238s*) +31%
SL transport of UKCA fields/SL_TRACER1_4A & TR_SET_PHYS_4A (+256s) +21%
Convective transport of UKCA fields/NI_CONV_CTL (+171s) +14%
Meaning of UKCA fields for diagnostics (+60s) +5%
What is difficult to remove from Snr (done through D1 and blind to section)
Scatter and gather of UKCA fields (+45s) +4%
What can't be removed from Snr
RADAER/UKCA_RADAER_BAND_AVERAGE (+190s) +16%
Receive/wait for coupling fields/OASIS3_GET_SNR (+140s) +12%
* Estimates

Final Snr was 26% slower than CLASSIC (1,532s)