How to increase performance of pouchdb-find queries? - performance

Question

I'm using pouchDB replication from couchDB in react native. This is my package.json:
"pouchdb": "^6.3.4",
"pouchdb-find": "^6.3.4",
"pouchdb-react-native": "^6.3.4",
I've a database named "databaseA" where one of the column is "col1". I've written a query using pouchdb-find to get all records of databaseA with matching
value in col1.
const localDB = new PouchDB('databaseA');
const remoteDB = new PouchDB('databaseA');
PouchDB.plugin(findPlugin);
localDB.replicate.from(
remoteDB,
(err, response) => {
if (err) {
return console.log(err);
}
},
);
localDB.createIndex({
index: {
fields: ['col1', 'col2'],
ddoc: 'col1-col2-index',
},
});
localDB.find({
selector: {
col1: {
$eq: '1',
},
col2: true,
},
fields: ['_id', 'col1', 'col2' ],
limit: 0,
// sort: [‘_id’],
use_index: 'col1-col2-index',
}).then((results) => {
alert(`Index called to increase speed: ${results.docs.length}`);
}).catch((ex) => {
// alert(`Index called to increase speed: Exception: ${JSON.stringify(ex)}`);
});
export function getItems(col1) {
const startTime = new Date();
return (dispatch, getState) => {
return localDB.find({
selector: {
col1: {
$eq: col1,
},
col2: true,
},
fields: ['_id', 'col2', 'col1' ],
// sort: [‘_id’],
use_index: 'col1-col2-index',
}).then((results) => {
const time = new Date().getTime() - startTime;
alert(`Total time ${time}`);
}).catch((ex) => {
console.log(ex);
});
};
}
I've around 900 records in the database. It takes nearly 2minutes which is quite high to query. How can the performance of this query be increased? Please help