Well, more than 2 minutes is still long, and this morning, while thinking about it during breakfast, I've found the clue : the number of "price relationships" as explained in http://groups.google.com/group/ledger-cli/msg/8158214761fcf1ef.
So I've tested: 1) downsizing my prices.db to one value per month 2) reporting only monthly or yearly % time ledger reg -X € -J 2m07.451s % time ledger reg -X € -J --price-db prices.db-monthly 42.755s % time ledger reg -X € -J -M 34.802s % time ledger reg -X € -J -M --price-db prices.db-monthly 12.562s % time ledger reg -X € -J -Y 9.555s % time ledger reg -X € -J -Y --price-db prices.db-monthly 3.401s % wc -l prices.db prices.db-monthly 14804 prices.db 963 prices.db-monthly By reducing the number of registry lines to analyse (using --monthly=- M or --yearly=-Y) *AND* by reducing the number of values in prices.db files (by moving away from daily values to monthly values), the number of "price relationships" is greatly reduced. So, as "ledger reg -X € -J -M --price-db prices.db-monthly" is exactly what I want, and 12 seconds is more than acceptable, I will consider this thread as ended! ;-) Thank you John for improvements and explanations Thierry
