Add benchmark for LoadJSONPack
Add benchmark for LoadJSONPack

byo/restic,episource/restic,stuertz/restic,ar-jan/restic,middelink/restic,restic/restic,middelink/restic,jayme-github/restic,fawick/restic,arithmetric/restic,ckemper67/restic,ar-jan/restic,fawick/restic,howeyc/restic,byo/restic,mappu/restic,kurin/restic,bchapuis/restic,jayme-github/restic,restic/restic,stuertz/restic,kurin/restic