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What is the fastest way to create a checksum for large files in C#
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Invoke the windows port of md5sum.exe. It's about two times as fast as the .NET implementation (at least on my machine using a 1.2 GB file)
public static string Md5SumByProcess(string file) {
var p = new Process ();
p.StartInfo...
Convert PDF to image with high resolution
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It appears that the following works:
convert \
-verbose \
-density 150 \
-trim \
test.pdf \
-quality 100 \
-flatten \
-sharpen 0x1.0 \
24-18.jpg
It results in the left image. Compa...
How to turn on line numbers in IDLE?
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Version 3.8 or newer:
To show line numbers in the current window, go to Options and click Show Line Numbers.
To show them automatically, go to Options > Configure IDLE > General and check the Show line numbers in new windows box.
Version 3.7 or older:
Unfortunately there is no...
iTerm2 keyboard shortcut - split pane navigation
... and ] are also impossible to use on the french layout, ⌘+⌥+arrow-keys wins
– Cyril Duchon-Doris
Aug 17 '18 at 16:12
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show 2 more comme...
Error - Unable to access the IIS metabase
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On Windows 8 Pro:
%systemroot%\inetsrv\config
On Windows 7 and 8.1 and 10
%systemroot%\System32\inetsrv\config
(Where %systemroot% is usually C:\Windows)
Navigate to the appropriate location above in Windows Explorer. ...
Error during installing HAXM, VT-X not working
...dering graphics more smoothly. I downloaded appropriate file HAXM file for Windows 7 64 bit, unpacked and started installing. However, during the installation process I get this error:
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JSON formatter in C#?
...oft.Json version 10.0.3. Formatted a 6MB JSON file in under 5 seconds on a Win10 Intel i7-7700 CPU (4.20Ghz).
– batpox
Jul 28 '17 at 0:17
add a comment
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Is a LINQ statement faster than a 'foreach' loop?
...i3-2328M CPU @ 2.20GHz, 2200 Mhz, 2 Core(s) with 8GB ram running Microsoft Windows 7 Ultimate.
It looks like LINQ might be faster than for each loop. Here are the results I got:
Exists = True
Time = 174
Exists = True
Time = 149
It would be interesting if some of you could copy & paste th...
How to force LINQ Sum() to return 0 while source collection is empty
Basically when I do the following query, if no leads were matched the following query throws an exception. In that case I'd prefer to have the sum equalize 0 rather than an exception being thrown.
Would this be possible in the query itself - I mean rather than storing the query and checking query.A...
Does Foreign Key improve query performance?
...Edit
As the link now seems to be dead (kudos to Chris for noticing), following shows the gist of why foreign keys can improve (and hurt) performance.
Can Foreign key improve performance
Foreign key constraint improve performance at the time of reading
data but at the same time it slows down ...