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海量数据相似度计算之simhash短文本查找 - 大数据 & AI - 清泛网 - 专注C/C++及内核技术
...条数据就要去比较1000w次的simhash，计算量还是蛮大，普通PC 比较1000w次海明距离需要 300ms ，和5000w数据比较需要1.8 s。看起来相似度计算不是很慢，还在秒级别。给大家算一笔账就知道了：
随着业务增长需要一个小时处理100w次...
How can I remove the gloss on a select element in Safari on Mac?
...jk1IDEwIj48ZGVmcz48c3R5bGU+LmNscy0xe2ZpbGw6I2ZmZjt9LmNscy0ye2ZpbGw6IzQ0NDt9PC9zdHlsZT48L2RlZnM+PHRpdGxlPmFycm93czwvdGl0bGU+PHJlY3QgY2xhc3M9ImNscy0xIiB3aWR0aD0iNC45NSIgaGVpZ2h0PSIxMCIvPjxwb2x5Z29uIGNsYXNzPSJjbHMtMiIgcG9pbnRzPSIxLjQxIDQuNjcgMi40OCAzLjE4IDMuNTQgNC42NyAxLjQxIDQuNjciLz48cG9seWdvbiBjbGFzc...
How to secure RESTful web services?
... answered Jan 27 '11 at 16:46
pc1oad1etterpc1oad1etter
7,73399 gold badges4343 silver badges6262 bronze badges
...
How to retrieve the current version of a MySQL database management system (DBMS)?
...e | i686 |
| version_compile_os | pc-linux-gnu |
+-------------------------+------------------------------------------+
5 rows in set (0.04 sec)
MySQL 5.0 Reference Manual (pdf) - Determining Your Current MySQL Version - page 42
...
Git undo local branch delete
...his deletes and then immediately restores a branch named master2:
user@MY-PC /C/MyRepo (master)
$ git branch -D master2
Deleted branch master2 (was 130d7ba). <-- This is the SHA1 we need to restore it!
user@MY-PC /C/MyRepo (master)
$ git branch master2 130d7ba
...
powershell - extract file name and extension
...ervers for its integrity:
$Comp = get-content c:\myfile.txt
ForEach ($PC in $Comp) {
dir "\\$PC\Folder\Share\*.*" | Select-Object $_.BaseName
}
Nice and simple, and it shows the directory and the file inside it. If you want to specify one file name or extension, just replace the *'s with ...
迅雷发布无限节点CDN 每GB仅0.1元 - 资讯 - 清泛网 - 专注C/C++及内核技术
...个很好的计算设备。它最大的特点是性能强、功耗低，跟PC比起来是两个数量级的差别。如果今天你是开着计算机、PC机在给我做挖矿，我建议他买一个赚钱宝，这样的话你的耗电什么都会大幅下降。同时，我们能够跑的带宽量...
Floating point vs integer calculations on modern hardware
... 15.362536
This uses code from http://pastebin.com/Kx8WGUfg as benchmark-pc.c
g++ -fpermissive -O3 -o benchmark-pc benchmark-pc.c
I've run multiple passes, but this seems to be the case that general numbers are the same.
One notable exception seems to be ALU mul vs FPU mul. Addition and subtra...
Simplest way to detect a mobile device in PHP
... This keyword "tablet" is creating me a problem on some IE8 (PC) headers that have "Tablet PC 2.0" in response
– Mladen Janjetovic
Oct 29 '13 at 15:55
...
'printf' vs. 'cout' in C++
...bl printf
mov r0, #0
pop {lr}
mov pc, lr
.align 2
@ BB#1:
You can easily notice that two strings, and 2 (number) are pushed as printf arguments. That's about it; there is nothing else. For comparison, this is iostream compiled to assembly. No, ther...