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Type:
Improvement
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Resolution: Won't Fix
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Priority:
Major - P3
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None
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Affects Version/s: 2.12.3
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Component/s: Performance
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None
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Environment:MBP, 16G RAM, Single instance MongoDB 2.6.1
First populate a test collection:
for(var i=0;i<5000;i++) db.test.save(obj);
// where obj is a rich document, avg size 8KB.
When ran within Mongo shell:
Date.timeFunc(function(){
for(var i=0;i<30;i++){ db.test.find().toArray() }
})
Total time used: 1996ms (30 queries)
Average time per query: 67ms
When ran in a standard java program:
DB db = mongoClient.getDB( "ceairdb" );
DBCollection coll = db.getCollection("test");
try {
Date now = new Date();
Date end = null;
for(int k=0;k<30;k++){
cursor = coll.find();
cursor.toArray();
}
end = new Date();
} finally {
cursor.close();
}
Total time used: 8600 ms
Average time per query: 280 ms
Expected: Java drivers's performance should be comparable to shell version