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Type:
Bug
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Resolution: Fixed
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Priority:
Major - P3
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Affects Version/s: bson-4.4.1
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Component/s: BSON, Performance
MongoDB is initialized as ReplicationSet.
Performance-Regression for simple Find/Create Operation. Just change the used MongoDB-Version between 3.6.9 and 4.0.0 and run the script.
My Results:
3.6.9:
create: 11.380s
find - toArray: 1.913s
find - cursor: 2.827s
delete: 16.908s
4.0.0:
create: 16.860s
find - toArray: 2.613s
find - cursor: 5.485s
delete: 17.078s
--> Create is ~50% slower
--> Find is nearly 100% slower
Testcode:
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import { MongoClient } from "mongodb"; async function main(): Promise<void> { const client = new MongoClient(`mongodb://localhost:27017/`, {}); await client.connect(); const files = []; for (let i = 0; i < 1000000; i++){ files.push({a: i, b: i, c: i, d: i}); } console.time("create"); await client.db("test").collection("test").insertMany(files); console.timeEnd("create"); console.time("find - toArray"); await client.db("test").collection("test").find({}, {projection: {_id: 1}}).toArray(); console.timeEnd("find - toArray"); console.time("find - cursor"); for await(const _ of client.db("test").collection("test").find({})) { } console.timeEnd("find - cursor"); console.time("delete"); await client.db("test").collection("test").deleteMany({}); console.timeEnd("delete"); await client.db("test").dropDatabase(); process.exit(); } main().catch(console.error)
- is related to
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- Closed
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