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How to use Elasticsearch with MongoDB?
...tures, and the mongodb river project just doesn't produce a usable product fast enough to keep stable. That said Mongodb River is definitely not something I'd go into production with. It's posed more problems than its worth. It will randomly drop write under heavy load, it will consume lots of memor...
What algorithm gives suggestions in a spell checker?
...ou can improve the spelling corrector performance using a Bloom Filter and faster candidate hashing.)
The requirements for a spell checker are weaker. You have only to find out that a word is not in the dictionary. You can use a Bloom Filter to build a spell checker which consumes less memory. An a...
Why switch is faster than if
Lots of Java books describe the switch statement as being faster than the if else statement. But I did not find out anywhere why switch is faster than if .
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What are the main performance differences between varchar and nvarchar SQL Server data types?
...really will never be necessary, don't bother.
I would not have a hard and fast "always nvarchar" rule because it can be a complete waste in many situations - particularly ETL from ASCII/EBCDIC or identifiers and code columns which are often keys and foreign keys.
On the other hand, there are plent...
What are the applications of binary trees?
...e so insertion and removal times take a maximum of O(log n), which is very fast. Some of these containers are map, multimap, set, and multiset.
Example code for an AVL tree can be found at http://ideone.com/MheW8
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Which is faster: Stack allocation or Heap allocation
...
Stack allocation is much faster since all it really does is move the stack pointer.
Using memory pools, you can get comparable performance out of heap allocation, but that comes with a slight added complexity and its own headaches.
Also, stack vs....
MongoDB with redis
...n to use both. Here's why:
MongoDB can store more data cheaper.
Redis is faster for the entire dataset.
MongoDB's culture is "store it all, figure out access patterns later"
Redis's culture is "carefully consider how you'll access data, then store"
Both have open source tools that depend on them, ...
Common programming mistakes for Clojure developers to avoid [closed]
...n take a PersistentArrayMap and return a PersistentHashMap, which performs faster for larger maps.
Using a function as the recursion point rather than a loop to provide initial bindings
When I started out, I wrote a lot of functions like this:
; Project Euler #3
(defn p3
([] (p3 775147 60085...
Why do we need boxing and unboxing in C#?
...ol, a byte, a 32-bit int, a 32-bit uint, etc. The Stack is both simple and fast. As variables are added they just go one on top of another, so the first you declare sits at say, 0x00, the next at 0x01, the next at 0x02 in RAM, etc. In addition, variables are often pre-addressed at compile-time, so t...
How to use git bisect?
...er this test repo if you want to play around with the command.
Failure is fast, success is slow
Sometimes:
failure happens fast, e.g. one of the first tests breaks
success takes a while, e.g. the broken test passes, and all other tests we don't care about follow
For those cases, e.g. supposing...