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How do I discover memory usage of my application in Android?
...d memory in a graph, and garbage collection
events over time.
Quickly testing whether app slowness might be
related to excessive garbage collection events.
Quickly testing
whether app crashes may be related to running out of memory.
Figure 1. Forcing a GC (Garbage Collection) even...
Please explain some of Paul Graham's points on Lisp
...gt; STRING
2) A symbol type. Symbols differ from strings in that you can test equality by comparing a pointer.
A symbol is a data object with a name. Usually the name can be used to find the object:
|This is a Symbol|
this-is-also-a-symbol
(find-symbol "SIN") -> SIN
Since symbols are re...
No ConcurrentList in .Net 4.0?
...This was the goal of my ConcurrentList<T> implementation. But when I tested its performance in multithreaded scenarios, I found that simply synchronizing adds to a List<T> was faster. Basically, adding to a List<T> is lightning fast already; the complexity of the computational step...
Calling clojure from java
... This example used the Clojure-1.1.0 jar.
Update: This answer has been re-tested using the following tools:
Clojure 1.5.1
Leiningen 2.1.3
JDK 1.7.0 Update 25
The Clojure Part
First create a project and associated directory structure using Leiningen:
C:\projects>lein new com.domain.tiny
N...
How to upload a file in Django? [closed]
...s are created::
uploader/
__init__.py
admin.py
app.py
models.py
tests.py
views.py
migrations/
__init__.py
3. Update settings.py
On sample/settings.py add 'uploader' to INSTALLED_APPS and add MEDIA_ROOT and MEDIA_URL, ie::
INSTALLED_APPS = [
'uploader',
...<other app...
How to search file text for a pattern and replace it with a given value
...
There are a lot of ways this can go wrong so test it thoroughly before attempting it against a critical file.
– the Tin Man
Dec 6 '19 at 20:04
...
accepting HTTPS connections with self-signed certificates
...port the endpoint cert) into a BouncyCastle formatted keystore.
I didn’t test it, but I think the order of importing the certificates is important. This means, import the lowermost Intermediate CA certificate first and then all the way up to the Root CA certificate.
With the following command a ne...
Efficient Algorithm for Bit Reversal (from MSB->LSB to LSB->MSB) in C
...16) | (x << 16));
}
From the famous Bit Twiddling Hacks page:
Fastest (lookup table):
static const unsigned char BitReverseTable256[] =
{
0x00, 0x80, 0x40, 0xC0, 0x20, 0xA0, 0x60, 0xE0, 0x10, 0x90, 0x50, 0xD0, 0x30, 0xB0, 0x70, 0xF0,
0x08, 0x88, 0x48, 0xC8, 0x28, 0xA8, 0x68, 0xE8, 0...
What are the key differences between Apache Thrift, Google Protocol Buffers, MessagePack, ASN.1 and
...es pretty much all of their work using Protocol Buffers, so it is a battle-tested, battle-hardened protocol (albeit not as battle-hardened as ASN.1 is. It has much better documentation than does Thrift, but, being a Google product, it is highly likely to be unstable (in the sense of ever-changing, ...
Which is faster: Stack allocation or Heap allocation
...stion any further.
The optimizer has a mission to get rid of the code I'm testing. I don't see any reason to tell the optimizer to run and then try to fool the optimizer into not actually optimizing. But if I saw value in doing that, I would do one or more of the following:
Add a data member to...