Trier un énorme fichier JSON

Bonjour,

J'ai un fichier contenant toutes les communes de France au format GeoJson avec des milliers de bouts de code comme celui ci. Dès que j'ouvre le fichier mon vs code plante.

J'aimerais trier ce fichier par départements dans plusieurs fichiers en fonctions du code insee. Ex: Pour l'Herault on récupère toutes les lignes avec un code commencant par 34. Y'aurait il un moyen de faire ça rapidement ?

{"type":"Feature","geometry":{"type":"Polygon","coordinates":[[[4.03464,43.65735],[4.03921,43.65459],[4.04321,43.65267],[4.04706,43.65159],[4.04696,43.65],[4.05042,43.64739],[4.05092,43.64333],[4.05255,43.64172],[4.05487,43.64094],[4.05735,43.64098],[4.06149,43.63835],[4.05816,43.63638],[4.05005,43.63232],[4.0462,43.63021],[4.04656,43.62516],[4.04755,43.62317],[4.04327,43.62297],[4.03548,43.62128],[4.03211,43.62677],[4.03002,43.62806],[4.02866,43.6279],[4.02721,43.63136],[4.02689,43.63311],[4.02423,43.63544],[4.02256,43.6353],[4.01675,43.63826],[4.01348,43.63925],[4.01297,43.6475],[4.01564,43.64994],[4.02291,43.64821],[4.02607,43.64784],[4.03118,43.64894],[4.02958,43.65153],[4.02722,43.65367],[4.02636,43.65617],[4.02657,43.65891],[4.02714,43.65953],[4.02981,43.6594],[4.03214,43.65671],[4.03464,43.65735]]]},"properties":{"code":"34176","nom":"Mudaison"}}

Merci bcp pour votre temps,

Cordialement,