大约有 16,000 项符合查询结果（耗时：0.0186秒） [XML]
Is it better to use std::memcpy() or std::copy() in terms to performance?
...55 -0.18%
5.57 5.53 -0.72%
5.57 5.52 -0.91%
5.56 5.57 +0.18%
5.56 5.57 +0.18%
5.56 5.53 -0.54%
5.53 5.57 +0.72%
5.59 5.57 -0.36%
5.57 5.56 -0.18%
Total average decrease in speed o...
What is the performance cost of having a virtual method in a C++ class?
...ew Grant
55.8k2222 gold badges126126 silver badges139139 bronze badges
...
What are the differences between a multidimensional array and an array of arrays in C#?
... implementation they are not.
23.084 16.634 15.215 15.489 14.407 13.691 14.695 14.398 14.551 14.252
25.782 27.484 25.711 20.844 19.607 20.349 25.861 26.214 19.677 20.171
5.050 5.085 6.412 5.225 5.100 5.751 6.650 5.222 6.770 5.305
The first row are timings ...
Error in finding last used cell in Excel with VBA
...o cells with data in the worksheet then .Find will give you Run Time Error 91: Object Variable or With block variable not set
With Sheets("Sheet1")
If Application.WorksheetFunction.CountA(.Cells) <> 0 Then
lastrow = .Cells.Find(What:="*", _
After:=.Range("A1"...
What's the equivalent of use-commit-times for git?
... 2,495 updated files
wine
# 13.53 seconds
# 443,979 log lines processed
# 91,703 commits evaluated
# 6,005 updated files
linux kernel
# 59.11 seconds
# 1,484,567 log lines processed
# 313,164 commits evaluated
# 40,902 updated files
...
Difference between 3NF and BCNF in simple terms (must be able to explain to an 8-year old)
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91
The subtle difference is that 3NF makes a distinction between key and non-key attributes (also ...
Is R's apply family more than syntactic sugar?
...me(z <- lapply(y, foo))
# user system elapsed
# 2.89 0.00 2.91
system.time(z <- vapply(y, foo, numeric(1)))
# user system elapsed
# 1.35 0.00 1.36
Jan. 1, 2020 update:
system.time({z1 <- numeric(1e6); for(i in seq_along(y)) z1[i] <- foo(y[i])})
# user syst...
What is the most efficient/elegant way to parse a flat table into a tree?
...
Leniel Maccaferri
91.3k4040 gold badges331331 silver badges445445 bronze badges
answered Dec 22 '10 at 4:31
bobobobobob...
What's the difference between UTF-8 and UTF-8 without BOM?
...
91
Here are examples of the BOM usage that actually cause real problems and yet many people don't ...
Is XSLT worth it? [closed]
...
91
So much negativity!
I've been using XSLT for a good few years now, and genuinely love it. The ...