mongo/jstests/core/bulk_insert.js

// Tests bulk insert of docs from the shell

var coll = db.bulkInsertTest
coll.drop()

var seed = new Date().getTime();
Random.srand( seed );
print("Seed for randomized test is " + seed);

var bulkSize = Math.floor( Random.rand() * 200 ) + 1
var numInserts = Math.floor( Random.rand() * 300 ) + 1

print( "Inserting " + numInserts + " bulks of " + bulkSize + " documents." )

for( var i = 0; i < numInserts; i++ ){
    var bulk = []
    for( var j = 0; j < bulkSize; j++ ){
        bulk.push({ hi : "there", i : i, j : j })
    }
    
    coll.insert( bulk )
}

assert.eq( coll.count(), bulkSize * numInserts )