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Tools for analyzing performance of a Haskell program
...user 0.05s system 98% cpu 13.479 total
Which already gives us a lot of information: you only have a 2M heap, and GC takes up 0.8% of time. So no need to worry that allocation is the problem.
Time Profiles
Getting a time profile for your program is straight forward: compile with -prof -auto-all
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How do I give text or an image a transparent background using CSS?
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@grm: W3C considered introducing a #RRGGBBAA hex code format, but they decided not to (for various reasons), so we can't.
– outis
Dec 15 '12 at 6:59
95
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How can I do DNS lookups in Python, including referring to /etc/hosts?
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@RobertSiemer Sorry for the late comment: the result may be cached by the local resolver. nscd and nslcd on Unix boxes can do this. It could also be cached by a local name server configured for caching (a common setup, once upon a time. Probably...
Map Tiling Algorithm
...es are detected the next thing to do is to select the right smoothing tile for each edge tile. Here is my representation of your smoothing tiles.
Note that there are actually not that many different types of tiles. We need the eight outer tiles from one of the 3x3 squares but only the four corner...
How do you make an array of structs in C?
... double mass;
};
struct body bodies[n];
int main()
{
int a, b;
for(a = 0; a < n; a++)
{
for(b = 0; b < 3; b++)
{
bodies[a].p[b] = 0;
bodies[a].v[b] = 0;
bodies[a].a[b] = 0;
}
bodies...
How can I eliminate slow resolving/loading of localhost/virtualhost (a 2-3 second lag) on Mac OS X L
...same problem and it was driving me crazy!
Put all your hosts file entries for localhost into one line like so:
127.0.0.1 localhost myproject.dev myotherproject.dev
::1 localhost
fe80::1%lo0 localhost
Worked like a charm for me. Seems like a bug in Lion.
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How do multiple clients connect simultaneously to one port, say 80, on a server? [duplicate]
...an simultaneously connect to say port 80. I know each client has a unique (for their machine) port. Does the server reply back from an available port to the client, and simply state the reply came from 80? How does this work?
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Boolean Field in Oracle
...oolean-like
flags that Oracle's data dictionary views use, selecting 'Y' for true
and 'N' for false. However, to interact correctly with host
environments, such as JDBC, OCCI, and other programming environments,
it's better to select 0 for false and 1 for true so it can work
correctly with...
How do I combine a background-image and CSS3 gradient on the same element?
How do I use CSS3 gradients for my background-color and then apply a background-image to apply some sort of light transparent texture?
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What does this square bracket and parenthesis bracket notation mean [first1,last1)?
...sis means that end is exclusive and doesn't contain the listed element. So for [first1, last1), the range starts with first1 (and includes it), but ends just before last1.
Assuming integers:
(0, 5) = 1, 2, 3, 4
(0, 5] = 1, 2, 3, 4, 5
[0, 5) = 0, 1, 2, 3, 4
[0, 5] = 0, 1, 2, 3, 4, 5
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