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What is the runtime performance cost of a Docker container?
...ownload it for full access.
Taking a look at Disk I/O:
Now looking at CPU overhead:
Now some examples of memory (read the paper for details, memory can be extra tricky):
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improve t...
How to Deal with Temporary NSManagedObject instances?
...ul as standing up a NSManagedObjectContext is expensive in both memory and CPU. I realize this was originally in some of the Apple examples, but they have updated and corrected those examples.
– Marcus S. Zarra
Jul 16 '10 at 15:39
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Database sharding vs partitioning
...important to understand that databases are extremely resource intensive:
CPU
Disk
I/O
Memory
Many DBA's will partition on the same machine, where the partitions will share all the resources but provide an improvement in disk and I/O by splitting up the data and/or index.
While other strategies ...
How to deal with a slow SecureRandom generator?
...ized environment because it doesn't require any special hardware, only the CPU itself and a clock.
On Ubuntu/Debian:
apt-get install haveged
update-rc.d haveged defaults
service haveged start
On RHEL/CentOS:
yum install haveged
systemctl enable haveged
systemctl start haveged
Option 2. Reduce...
Volatile vs Static in Java
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What is the cache when you say "locally cached"? CPU cache, some kind of JVM cache?
– mert inan
Dec 17 '12 at 21:15
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Is memcached a dinosaur in comparison to Redis? [closed]
...ance peak with only a few concurrent requests since it only makes use of 1 cpu core/thread. The suggested method of circumventing this is to run multiple instances of Redis on one machine with consistent hashing, but this is a really poor solution. So if you need high concurrency and have multi-core...
Why is Magento so slow? [closed]
...ame trees for information. This takes both memory (storing the trees) and CPU (parsing the trees). Some of these (especially the layout tree) are huge. Also, unless caching is on, these tree are built up from files on disk and on each request.
Magento uses its configuration system to allow you to...
Queue.Queue vs. collections.deque
... try/except, you will end up with a busy loop eating up enormous amount of CPU just waiting for new data. This seems like a horribly inefficient approach compared to the blocking calls offered by Queue, which ensure that the thread waiting for data will go to sleep and not waste CPU time.
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How does a “stack overflow” occur and how do you prevent it?
...nsumes as much as 64 bytes on the stack (32 bit processor, saving half the CPU registers, flags, etc)
Keep your call tree shallow (similar to the above statement)
Web servers
It depends on the 'sandbox' you have whether you can control or even see the stack. Chances are good you can treat web se...
Why does string::compare return an int?
... modern hardware) an integer of the same size as the system bus and/or the cpu registers, what is called the machine word. Therefore int is usually passed along faster than smaller types, because it doesn't require alignment, masking and other operations.
The smaller types exist mainly to allow RAM...