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What is the fastest way to create a checksum for large files in C#
...2s when using the original, none buffered code.
I am running an i5 2500K CPU, 12 GB ram and a OCZ Vertex 4 256 GB SSD drive.
So I thought, what about a standard 2TB harddrive. And the results were like this
10.000: 368,52s
100.000: 364,15s
1.000.000: 363,06s
10.000.000: 678,96s
100.000.000: 617...
How to check if a process is running via a batch script
... for such a simple query, but they also run a second or so and use tons of cpu! This is much better, also worked with no admin permissions (Windows Server 2012).
– Eugene Marin
Jun 21 '18 at 15:36
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How does push notification technology work on Android?
...rk card is polling whether the router has redirected the packet to it. The CPU is polling whether the network card has raised an interrupt. It's all about how to poll efficiently.
– Tuupertunut
Jan 13 '19 at 3:01
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Changing one character in a string
...ing Python, and that language is a total mess. Regarding your note on fast CPUs I'm totally with you. But a part of that problem is the popular disapproval of premature optimization, which leads to slow interpreters and libraries by leaking lots of CPU cycles on the way.
– Bach...
MySQL select 10 random rows from 600K rows fast
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I am getting fast queries (around 0.5 seconds) with a slow cpu, selecting 10 random rows in a 400K registers MySQL database non-cached 2Gb size. See here my code: Fast selection of random rows in MySQL
<?php
$time= microtime_float();
$sql='SELECT COUNT(*) FROM pages';
$rquery= B...
What is the best way to test for an empty string in Go?
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There was a time when I counted CPU cycles and reviewed the assembler that the C compiler produced and deeply understood the structure of C and Pascal strings... even with all the optimizations in the world len() requires just that little extra bit of work....
婚庆O2O：领跑的企业也就只走到B轮 - 资讯 - 清泛网 - 专注C/C++及内核技术
...意思，很好玩？然并卵，怎么赚钱呐？如果不能解决这个问题，能叫商业创业吗？又不是过家家，自己嗨就行。当然如果只是闲着没事儿，想为爱晒幸福、秀恩爱的新人们多提供一些渠道，活着到也无妨。只是看你们撑的这么辛...
Difference between StringBuilder and StringBuffer
...ng and unlocking code for synchronization which will unnecessarily take up CPU time. Don't use locks unless it is required.
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Volatile boolean vs AtomicBoolean
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Aren't CPU caches the main factor for setting volatile? To ensure that the value read is actually what it was set to most recently
– jocull
Mar 11 '19 at 14:52
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How to paginate with Mongoose in Node.js?
....g. pageNumber above) increases, cursor.skip() will become slower and more CPU intensive. With larger collections, cursor.skip() may become IO bound.
To achieve pagination in a scaleable way combine a limit( ) along with at least one filter criterion, a createdOn date suits many purposes.
MyMode...