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Python pandas: fill a dataframe row by row
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just want to ask, is this CPU and memory efficient?
– czxttkl
Jun 29 '17 at 18:52
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Image comparison - fast algorithm
... it would require an array of 1 million 64-bit hash values (8 MB). On some CPUs this fits in the L2/L3 cache! In practical usage I have seen a corei7 compare at over 1 Giga-hamm/sec, it is only a question of memory bandwidth to the CPU. A 1 Billion-image database is practical on a 64-bit CPU (8GB RA...
What do we mean by Byte array? [closed]
..., numbers from -128 to 127, single characters using ASCII e.g. 'a' or '%', CPU op-codes), each byte in a byte array may be any of these things, or contribute to some multi-byte values such as numbers with larger range (e.g. 16-bit unsigned int from 0..65535), international character sets, textual st...
how to remove the dotted line around the clicked a element in html
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@cpu_meltdown Try input:focus{outline: none}
– Sowmya
Nov 10 '16 at 10:45
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How To Capture A Minidump: Let Me Count The Ways - C/C++ - 清泛网 - 专注C/C++及内核技术
... processes. It’s great for snagging dumps when you have intermittent CPU spikes or memory usage. I find that I’m using this tool constantly on production servers to get minidumps of those hard to reproduce problems. Everyone using computers needs to know about this tool, even your grandm...
Ternary operator is twice as slow as an if-else block?
...itional with 1000 iterations: 47710ms
My system details:
x64 i7-2720QM CPU @2.20GHz
64-bit Windows 8
.NET 4.5
So unlike before, I think you are seeing a real difference - and it's all to do with the x86 JIT. I wouldn't like to say exactly what is causing the difference - I may update the post ...
Why is an int in OCaml only 31 bits?
...for a simple integer.
Also, you cannot pass such an integer object to the CPU to perform fast integer arithmetic. If you want to add two integers, you really only have two pointers, which point to the beginning of the object headers of the two integer objects you want to add. So, you first need to ...
What's the difference between utf8_general_ci and utf8_unicode_ci?
...ligible. It was devised in a time when servers had a tiny fraction of the CPU performance of today's computers.
Benefits of utf8mb4_unicode_ci over utf8mb4_general_ci
utf8mb4_unicode_ci, which uses the Unicode rules for sorting and comparison, employs a fairly complex algorithm for correct sortin...
What are the effects of exceptions on performance in Java?
... simplest way is using setjmp and longjmp. That means all registers of the CPU are written to the stack (which already takes some time) and possibly some other data needs to be created... all this already happens in the try statement. The throw statement needs to unwind the stack and restore the val...
Stopwatch vs. using System.DateTime.Now for timing events [duplicate]
... a lot of activity going on under the hood of the OS, which can steal some CPU time and slow down the execution of your code. That’s why it is best to execute the tests multiple times and then remove the lowest and the highest times. For that puprose it is a good solution to have a method that exe...