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How to remove spaces from a string using JavaScript?
...est solution on all browsers is / /g (regexp1a) - Chrome 17.7M (operation/sec), Safari 10.1M, Firefox 8.8M. The slowest for all browsers was split-join solution. Change to \s or add + or i to regexp slows down processing.
LONG strings
For string about ~3 milion character results are:
regexp1a: S...
Execute script after specific delay using JavaScript
...
There is the following:
setTimeout(function, milliseconds);
function which can be passed the time after which the function will be executed.
See: Window setTimeout() Method.
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Using LINQ to concatenate strings
... Made a test with 10.000.000 iterations, aggregate took 4.3 secs and string.join took 2.3 secs. So I would say the perf diff is unimportant for 99% of common use cases. So if you're already doing a lot of linq to process your data, there's usually no need to break that nice syntax and...
Is String.Contains() faster than String.IndexOf()?
...of a '@' char. 17.000.000 calls to Contains/IndexOf are made. Result: 12.5 sec for all Contains() calls, 2.5 sec for all IndexOf() calls. => IndexOf performs 5 times faster!! (.Net 4.8)
– CSharper
Sep 21 at 7:55
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Find a file in python
...I used a version of os.walk and on a larger directory got times around 3.5 sec. I tried two random solutions with no great improvement, then just did:
paths = [line[2:] for line in subprocess.check_output("find . -iname '*.txt'", shell=True).splitlines()]
While it's POSIX-only, I got 0.25 sec.
F...
How to handle a lost KeyStore password in Android?
... password might include for a very fast recover (for me it worked in <1 sec)
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What is the difference between UNION and UNION ALL?
...bar
Result:
+-----+
| bar |
+-----+
| foo |
+-----+
1 row in set (0.00 sec)
UNION ALL example:
SELECT 'foo' AS bar UNION ALL SELECT 'foo' AS bar
Result:
+-----+
| bar |
+-----+
| foo |
| foo |
+-----+
2 rows in set (0.00 sec)
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Core Data: Quickest way to delete all instances of an entity
...my app already far down the road porting to Core Data. Its taking multiple seconds to delete all 4000 entries from just one of several tables. This is too long for the user to wait. Same request directly with sqlite seems instantaneous.
– David
Jul 23 '12 at 4:...
REST API 404: Bad URI, or Missing Resource?
... no forwarding address is known." -- (See w3.org/Protocols/rfc2616/rfc2616-sec10.html#sec10.4.11)
– Brian Lacy
Apr 5 '12 at 15:56
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How fast is D compared to C++?
...582 ms.
scalar.d (modified OP source):
allocation: 5 ms, 293 μs, and 5 hnsecs
random: 10 ms, 866 μs, and 4 hnsecs
result: 53237080000
scalar products: 2 secs, 956 ms, 513 μs, and 7 hnsecs
This ran for ~2957 ms. Slower than the C++ implementation, but not too much.
scalar2.d (index/length...