This question is pretty broad; as it is, there is no mention of which instruments you’re interested in. For instance: Stocks Bonds Commodities Forex Derivatives (like Futures or Options) For the moment, I will assume you’re interested in stocks… if so, take a look at Ninja Trader, which offers these features for free. You can … Read more
This is possible now. Here is an example https://github.com/wg/wrk/blob/master/scripts/post.lua. wrk.method = “POST” wrk.body = “foo=bar&baz=quux” wrk.headers[“Content-Type”] = “application/x-www-form-urlencoded” save this in a *.lua script and pass it into your command line test with the -s flag.
Jmeter tells you how long each request actually took. AB just does some very basic math to get the overall average. So, the direct answer to your question is that jmeter gets it right and ab just makes a rough guess by giving you the mean across everything. But, sure, if you put the two … Read more
Vectorized operations like .^ are exactly the kind of thing that Octave is good at because they’re actually entirely implemented in specialized C code. Somewhere in the code that is compiled when Octave is built, there is a C function that computes .^ for a double and an array of doubles – that’s what you’re really timing … Read more
The short answer is that only new data gets sent down the wire. Here’s how it works. There are three important parts of the Meteor server that manage subscriptions: the publish function, which defines the logic for what data the subscription provides; the Mongo driver, which watches the database for changes; and the merge box, … Read more
Nevermind. The “length failure” merely indicates that about half the time the length of the response was different. Since the contents are dynamic, it’s probably the session identifier or something like that.