mongosh to mongo_dart

[paulobreim]

const nome = "john red"; db.iptu.find( { $text: { $search: "${nome}" }, "ano.nome_contrib_1": { $exists: true } }, { _id: 1, ano: { $filter: { input: "$ano", as: "item", cond: { $regexMatch: { input: "$$item.nome_contrib_1", regex:new RegExp(nome, "i") } } } } } )

I have this sequence in mongosh that is very fast on a record base that has thousands of register.
But I can't do it in mongo_dart, it's much slower. I did it like this:

String nome = 'john red'; final pipeline = [ { "\$match": { "\$text": {"\$search": "\"$nome\""}, "ano.nome_contrib_1": {"\$exists": true} } }, { "\$project": { "ano": { "\$filter": { "input": "\$ano", "as": "item", "cond": { "\$regexMatch": { "input": "\$\$item.nome_contrib_1", "regex": nome, "options": "i" } } } } } }, {"\$unwind": "\$ano"}, {"\$count": "total"} ]; print('inicio'); final result = await coll.aggregateToStream(pipeline).toList();

Work but is very slow when names is very common.
I have 2 keys for "ano.nome_contrib_1" this here, one as text and another commom as 1

any one can help?

tks
paulo