大约有 8,000 项符合查询结果（耗时：0.0292秒） [XML]
How do cache lines work?
...s)
L3 cache: 12ns to 20ns (24-40 cycles)
RAM: 60ns (120 cycles)
Since we mix different CPU types these are just estimates but give a good idea whats really going when a memory value is fetched and we might have a hit or a miss in certain cache layer.
So a cache basically speeds up memory access g...
What are the key differences between Apache Thrift, Google Protocol Buffers, MessagePack, ASN.1 and
All of these provide binary serialization, RPC frameworks and IDL. I'm interested in key differences between them and characteristics (performance, ease of use, programming languages support).
...
What is the purpose of a stack? Why do we need it?
... the RAM required to store machine code.
The actual machine code model is mixed, having both a stack and registers. One of the big jobs of the JIT code optimizer is to come up with ways to store variables that are kept on the stack in registers, thus greatly improving execution speed. A Dalvik ji...
base64 encoded images in email signatures
...me clients, src="sig.png" will work too.
You'd basically have a multipart/mixed, multipart/alternative, multipart/related message where the image attachment is in the related part.
Clients shouldn't block this image either as it isn't remote.
Or, here's a multipart/alternative, multipart/related ...
Is multiplication and division using shift operators in C actually faster?
...rrays of bits, use bit twiddling operators like & ^ | >> . Don't mix them; an expression that has both bit twiddling and arithmetic is a bug waiting to happen.
share
|
improve this answer
...
How can I add reflection to a C++ application?
... a list of all members of T. If we wanted have runtime reflection (ie RTTI mixed with reflection), the compiler would still know all reflected base types. It's quite likely members<T>(T&) would never be instantiated for T=std::string, so the RTTI for std::string or its derived classes need...
How can I make setuptools install a package that's not on PyPI?
... python-gearman that is only available from GitHub. The python-gearman version that's on PyPI is an old one. The Github source is setuptools-compatible, i.e. has setup.py, etc. Is there a way to make setuptools download and install the new version instead of looking for it on PyPI and installing the...
Generic method multiple (OR) type constraint
...o the 15th digit I'll return either an object that can go fishing or maybe mix
concrete.
The problem is that when you get into the method you have no idea if they've given you an IJumpRope or a PiFactory. Furthermore, when you go ahead and use the method (assuming that you've gotten it to magic...
What do Clustered and Non clustered index actually mean?
...pens a new page is allocated from anywhere in the filegroup (from either a mixed extent, for small tables or a non-empty uniform extent belonging to that object or a newly allocated uniform extent). This might not even be in the same file if the filegroup contains more than one.
The degree to which ...
Break a previous commit into multiple commits
... the commit, but leave the committed files in the index. You can also do a mixed reset by omitting --soft, depending on how close to the final result your initial commit is going to be. The only difference is whether you start with all the changes staged or with them all unstaged.
Now go in and edi...