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In Python, what is the difference between “.append()” and “+= []”?
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For your case the only difference is performance: append is twice as fast.
Python 3.0 (r30:67507, Dec 3 2008, 20:14:27) [MSC v.1500 32 bit (Intel)] on win32
Type "help", "copyright", "credits" or "license" for more information.
>>> import timeit
>>> timeit.Timer('s.append("...
Loop through files in a folder using VBA?
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Dir seems to be very fast.
Sub LoopThroughFiles()
Dim MyObj As Object, MySource As Object, file As Variant
file = Dir("c:\testfolder\")
While (file <> "")
If InStr(file, "test") > 0 Then
MsgBox "found " & fi...
When to use volatile with multi threading?
... loads and/or stores until the store buffer drains; that always happens as fast as possible on its own. (Does a memory barrier ensure that the cache coherence has been completed? addresses this misconception). So if you don't need ordering, just prompt visibility in other threads, mo_relaxed is fi...
MYSQL OR vs IN performance
...for sure, so I benchmarked both methods. I consistenly found IN to be much faster than using OR.
Do not believe people who give their "opinion", science is all about testing and evidence.
I ran a loop of 1000x the equivalent queries (for consistency, I used sql_no_cache):
IN: 2.34969592094s
OR: ...
Javascript Split string on UpperCase Characters
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This is my solution which is fast, cross-platform, not encoding dependent, and can be written in any language easily without dependencies.
var s1 = "ThisЭтотΨόυτÜimunəՕրինակPříkladדוגמאΠαράδειγμαÉlda";
s2 = s1.toLowerCas...
Picking a random element from a set
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Fast solution for Java using an ArrayList and a HashMap: [element -> index].
Motivation: I needed a set of items with RandomAccess properties, especially to pick a random item from the set (see pollRandom method). Random ...
NoSQL (MongoDB) vs Lucene (or Solr) as your database
... from MongoDB after searching on Solr.
Getting documents from MongoDB is faster than Solr because there is no
analyzers, scoring etc. [...]
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Ways to eliminate switch in code [closed]
...can compile a switch statement into either a simple lookup or an extremely fast static binary search, in either case without requiring any function calls.
– Nick Johnson
Sep 24 '08 at 10:44
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Why is try {…} finally {…} good; try {…} catch{} bad?
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David - I'd prefer the program to fail fast so I can be made aware of the problem rather that leave the program running in an unknown state.
– Erik Forbes
Sep 24 '08 at 22:38
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Maven Install on Mac OS X
...e brew install maven30 anymore as the most current version 3.2.1 is pretty fast and seems to not have the bugs that 3.1.1 had.
– Michael Hogenson
May 29 '14 at 19:01
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