performance-testing

问题 Suppose there is a simple audit table with two columns (in production there are more columns): ID | Date When the request is processed, we add a record into this table. Requests are processed in batches, there can be any number of items in a batch. For each item, we will add a record. There will be at least 2 second delay between batches (the number is configurable). The performance is measured by how fast we can process requests, per unit of time, for example, per second. Consider this

问题 Recently I am trying to measure the effect of the cpu scaling. Is it accurate if I use this clock to measure it? template<std::intmax_t clock_freq> struct rdtsc_clock { typedef unsigned long long rep; typedef std::ratio<1, clock_freq> period; typedef std::chrono::duration<rep, period> duration; typedef std::chrono::time_point<rdtsc_clock> time_point; static const bool is_steady = true; static time_point now() noexcept { unsigned lo, hi; asm volatile("rdtsc" : "=a" (lo), "=d" (hi)); return

问题 I am trying to compare native google maps (v2) vs the embeddable HTML version encapsulated in a webview on android. While it's pretty evident that the native maps are smoother and faster, I must prove that somehow. I have been searching on the internet for quite some time and did not seem to find any existing benchmarks. Does anybody know someone who actually done something similar? I am already thinking of creating such benchmark of my own, but how can the performance actually be measured?

问题 I'm new at Cassandra, and I'm trying to recover multiple rows using php, but the performance is really pour. Here is the code I'm using: * <?php $GLOBALS['THRIFT_ROOT'] = 'D:/cassandra/thrift/lib/php/src'; require_once $GLOBALS['THRIFT_ROOT'].'/packages/cassandra/Cassandra.php'; require_once $GLOBALS['THRIFT_ROOT'].'/packages/cassandra/cassandra_types.php'; require_once $GLOBALS['THRIFT_ROOT'].'/transport/TSocket.php'; require_once $GLOBALS['THRIFT_ROOT'].'/protocol/TBinaryProtocol.php';

问题 1. Description of the problem I am trying to pick the most appropriate (efficient) container to store unique n -dimensional vectors composed of floating numbers. Solving whole problem, the most important steps (related to the question) involve: Get a new vector from the external program (during the same run, all vectors have the same dimensionality). Check (ASAP) if a new point is already in this container: if exists - skip a lot of expensive steps and do the other steps; if doesn't - insert

问题 I am currently doing performance testing with JMeter for an application in my company. The application requires a login and I have to use multiple users. The way this is usually done in JMeter seems to be via CSV dataset, however I have access to the database and can read all the credentials from there directly. Since it is a test environment, all users have the same password, so I can hardcode it, but I need the list of usernames. JMeter can already do JDBC requests, but I was wondering if

问题 I am trying to use JMeter XPath Assertion on a tag value as below with XPath assertion command: //m:CurrencyNameResul/text() = Pounds Webservice Response: <?xml version="1.0" encoding="utf-8"?> <soap:Envelope xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/"> <soap:Body> <m:CurrencyNameResponse xmlns:m="http://www.oorsprong.org/websamples.countryinfo"> <m:CurrencyNameResult>Pounds</m:CurrencyNameResult> </m:CurrencyNameResponse> </soap:Body> </soap:Envelope> I am getting error prefix

问题 I am adding a React Native Slider component to an existing app, and prefer to utilize its onValueChange prop so that as the user slides the knob left and right, a couple of Text components have their values updated in response to the Slider's current value. On a first attempt this causes a significant amount of lag after letting go of the slider knob. StackOverflow isn't letting me embed the gif here so I'll leave the link instead: http://imgur.com/sEowpZt When I comment out onValueChange and

问题 I've been googling for some time but haven't found any clear solution for this. I want to measure full webpage weight / size (all doucment + scripts + fonts + styles etc.). I know the network tab in the devtools has size/content - but I want to have it summed (and not sum it every time). I've been looking for chrome.devtools.* API but haven't found anything straight-forward. Do you have some ideas how to achieve that? 回答1: In the Network tab, make sure 'Disable cache' is checked and then when

问题 I have one observation and want to get knowledge on Throughput calculation ,Some time Throughput is displaying in seconds,some times in minutes and some times in Hours,please any one provide exact answer to calculate throughput and when it will display in Seconds,Minutes and Hours in Jmeter Summary Report 回答1: From JMeter Docs: Throughput is calculated as requests/unit of time. The time is calculated from the start of the first sample to the end of the last sample. This includes any intervals