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Performance of foreach, array_map with lambda and array_map with static function
...rsion.
function lap($func) {
$t0 = microtime(1);
$numbers = range(0, 1000000);
$ret = $func($numbers);
$t1 = microtime(1);
return array($t1 - $t0, $ret);
}
function useForeach($numbers) {
$result = array();
foreach ($numbers as $number) {
$result[] = $number * 10;
}
retur...
How do I determine the size of an object in Python?
...terpret this? Well say you have a set with 10 items in it. If each item is 100 bytes each, how big is the whole data structure? The set is 736 itself because it has sized up one time to 736 bytes. Then you add the size of the items, so that's 1736 bytes in total
Some caveats for function and class d...
Multiple INSERT statements vs. single INSERT with multiple VALUES
I'm running a performance comparison between using 1000 INSERT statements:
4 Answers
4...
Learning assembly [closed]
...led by GCC was about 4kB, while if written by hand in assembly it's around 100 bytes. It's worse on Windows: last time I compared (admittedly, this was last century) the smallest "Hello World" I could get my Windows compiler of then-choice to generate was 52kB! Usually this boilerplate is only execu...
How do I tell Maven to use the latest version of a dependency?
...rsion plugin and check the pom back into source control. It also runs like 100x faster than the mvn versions plugin. Unfortunately it isn't written in a manner for public usage but if people are interested I could make it so and put it in a gist or github.
Going back to workflow as some comments as...
What's the fastest way to merge/join data.frames in R?
... 3x slower than data.table and in the second its 200x faster than plyr and 100 times faster than data.table. Below we show the input code, the output timings for the merge and the output timings for the aggregate. Its also worthwhile noting that sqldf is based on a database and therefore can hand...
How do I make a list of data frames?
...0), y = rnorm(50))
But who does only one simulation? You want to do this 100 times, 1000 times, more! But you don't want 10,000 data frames in your workspace. Use replicate and put them in a list:
sim_list = replicate(n = 10,
expr = {data.frame(x = rnorm(50), y = rnorm(50))},...
What is in your Mathematica tool bag? [closed]
...
@WReach +100! I wish I knew this earlier! This is very useful stuff, for me at least. Thanks for sharing!
– Leonid Shifrin
Mar 27 '11 at 18:37
...
What is the difference between compile and link function in angularjs
... message: "Address must begin with a number"
},
{ maxlength: 100,
message: "Address too long"
} ]
}
};
scope.state = {
address: '123 Fern Dr'
};
and you might want a directive:
<form name="theForm">
<my-field model="state" metadata="metadata" name="address...
Why does my application spend 24% of its life doing a null check?
...cheaper than accesses to memory of another socket (remote access are 20 to 100% slower, maybe even more). If on such computer, your tree uses 20 GB of RAM, at least 4 GB of your data is on the other NUMA node, and if accesses are 50% slower for remote memory, NUMA accesses slow down your memory acc...