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How often should you use git-gc?
...pository is used. With one user checking in once a day and a branch/merge/etc operation once a week you probably don't need to run it more than once a year.
With several dozen developers working on several dozen projects each checking in 2-3 times a day, you might want to run it nightly.
It won't...
Should I use Vagrant or Docker for creating an isolated environment? [closed]
...ctivity benefits:
Vagrant can launch VirtualBox, VMware, AWS, OpenStack, etc. machines. It doesn't matter what you need, Vagrant can launch it. If you are using Docker, Vagrant can install Docker on any of these so you can use them for that purpose.
Vagrant is a single workflow for all your projec...
_csv.Error: field larger than field limit (131072)
...ue is a C long ([Wikipedia]: C data types), whose size varies depending on CPU architecture and OS (ILP). The classical difference: for a 64bit OS (Python build), the long type size (in bits) is:
Nix: 64
Win: 32
When attempting to set it, the new value is checked to be in the long boundaries, th...
Convert UTC/GMT time to local time
... and found that the DateTime.Parse represented a significant percentage of CPU usage. (Incidentally, the CultureInfo constructor was not a significant contributor to CPU usage.)
So I set up a console app to parse a date/time string 10000 times in a variety of ways. Bottom line:
Parse() 10 sec
P...
Why do x86-64 instructions on 32-bit registers zero the upper part of the full 64-bit register?
... the high half doesn't create a dependency on the previous value, that the CPU would have to wait on. The register renaming mechanism would essentially be defeated if it wasn't done that way.
This way you can write fast code using 32-bit values in 64-bit mode without having to explicitly break depe...
App Inventor 2 Web客户端（Web）详细用法示例 · App Inventor 2 中文网
...参数
动手做：手机选图，上传到自己电脑
常见问题
带请求头鉴权
完整 .aia 源码
电脑端完整代码
PHP 接收示例
Node.js 与 Python 对应接收示例
Node.js 对应实现
Python 对应实现
...
Why is 1/1/1970 the “epoch time”?
... as business spreadsheets, scientific data presentation, time machine UIs, etc.
– Lenoxus
Mar 3 '14 at 15:51
...
What is the best open XML parser for C++? [duplicate]
...ments, computer games, or any other applications where available memory or CPU processing power comes at a premium. RapidXML is licensed under Boost Software License and its source code is freely available.
Features
Parsing speed (including DOM tree
building) approaching speed of
strlen function ...
SQL Server IN vs. EXISTS Performance
...ntil you see how the optimizer factors in all the other aspects of indexes etc., you really will never know.
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Convert objective-c typedef to its string equivalent
...Type.JSON sytax. FormatType is a type and the enum values (e.g. JSON, XML, etc.) are values that you can assign to that type.
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