Some tips : Do not index your collection before inserting, as inserts modify the index which is an overhead. Insert everything, then create index . instead of “save” , use mongoDB “batchinsert” which can insert many records in 1 operation. So have around 5000 documents inserted per batch. You will see remarkable performance gain . … Read more
Rate returns a per second value, so multiplying by 100 will give a percentage: rate(container_cpu_user_seconds_total[30s]) * 100
Try to calculate nth prime number to simulate CPU intensive work – public void Slow() { long nthPrime = FindPrimeNumber(1000); //set higher value for more time } public long FindPrimeNumber(int n) { int count=0; long a = 2; while(count<n) { long b = 2; int prime = 1;// to check if found a prime while(b … Read more
In the Network tab, make sure ‘Disable cache’ is checked and then when you load a page, look at the bottom panel for the total transfer size. See screenshot below: The individual sizes are rounded, but the total at the bottom uses the byte size, which you can see in the HAR. The total then … Read more
There may be better approaches, but there are also some frameworks that help implement benchmarking with JUnit. Some useful practices are warmup runs, statistical evaluations. Take a look at JUnitBenchmarks and JUnitPerf EDIT looks like JUnitBenchmarks has been deprecated since the question has been stated. The project’s maintainers recommend moving on to JMH. Thank you, … Read more
The one flaw in that approach is that the “real” time doSomething() takes to execute can vary wildly depending on what other programs are running on the system and what its load is. This makes the performance measurement somewhat imprecise. One more accurate way of tracking the time it takes to execute code, assuming the … Read more
How about this to convert IEnumerable<char> to string: string.Concat(x.TakeWhile(char.IsLetter));
V8 developer here. It’s not a bug, it’s just an optimization that V8 doesn’t do. It’s interesting to see that Firefox seems to do it… FWIW, I don’t see “ballooning to 400ms”; instead (similar to Jon Trent’s comment) I see about 2.5ms at first, and then around 11ms. Here’s the explanation: When you click only … Read more
You could use ConstantThroughputTimer. Quote from JMeter help files below: 18.6.4 Constant Throughput Timer This timer introduces variable pauses, calculated to keep the total throughput (in terms of samples per minute) as close as possible to a give figure. Of course the throughput will be lower if the server is not capable of handling it, … Read more
There are some things you can do to optimize your query. Here on MSDN you can find a nice overview. But to be honest, a stored procedure with manual mapping will always be faster in performance. But ask yourself, how important is performance? In most projects, development time is way more important then performance. What … Read more