大约有 23,000 项符合查询结果（耗时：0.0362秒） [XML]
为维护国家安全 中国限制出口无人机和高性能计算机 - 资讯 - 清泛网 - 专注...
...术注释
调整后的峰值性能（APP）是指数字计算机在进行64位或更多位的浮点加法和乘法运算的调整后的峰值速度。
本技术说明涉及的缩写：
n “数字计算机”中的处理器数量
I 处理器编号（1，……，n）
ti 处理器时钟周期（...
What characters can be used for up/down triangle (arrow without stem) for display in HTML?
...
U+26AB ⚫ MEDIUM BLACK CIRCLE
U+26BD ⚽ SOCCER BALL
U+26BE ⚾ BASEBALL
U+26BF ⚿ SQUARED KEY
U+26C0 ⛀ WHITE DRAUGHTSMAN
U+26C1 ⛁ WHITE DRAUGHTS KING
U+26C2 ⛂ BLACK DRAUGHTSMAN
U+26C3 ⛃ BLACK DRAUGHTS KING
U+26C4 ⛄ SNOWMAN WITHOUT SNOW
U+26C5 ⛅ SUN BEHIN...
Do try/catch blocks hurt performance when exceptions are not thrown?
...r version), but it was no difference in the Release version.
Conclution:
Based on these test, I think we can say that Try/Catch does have a small impact on performance.
EDIT:
I tried to increase the loop value from 10000000 to 1000000000, and ran again in Release to get some differences in the re...
Why is there no std::stou?
...+11 21.5/1: Effects: the first two functions call strtol(str.c_str(), ptr, base), and the last three functions call strtoul(str.c_str(), ptr, base), strtoll(str.c_str(), ptr, base), and strtoull(str.c_str(), ptr, base), respectively.
– Mike Seymour
Jan 3 '12 at...
How to find out which package version is loaded in R?
... LC_MEASUREMENT=en_US.UTF-8 LC_IDENTIFICATION=C
attached base packages:
[1] graphics grDevices utils datasets stats grid methods base
other attached packages:
[1] ggplot2_0.9.0 reshape2_1.2.1 plyr_1.7.1
loaded via a namespace (and not attached):
[1] co...
A fast method to round a double to a 32-bit int explained
... for help, clarification, or responding to other answers.Making statements based on opinion; back them up with references or personal experience.To learn more, see our tips on writing great answers.
Draft saved
Draft discarded
...
How can I get a precise time, for example in milliseconds in Objective-C?
...e is a weird conversion - last line of the first example is "return * (uint64_t *) &elapsedNano;" why not just "return (uint64_t)elapsedNano" ?
– Tyler
Dec 29 '10 at 23:00
8
...
How to have favicon / icon set when bookmarklet dragged to toolbar?
...t;<A HREF="http://mail.google.com/mail/u/0/#inbox" ICON="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABAAAAAQCAYAAAAf8/9hAAABV0lEQVQ4jdWQzUoCYRiFnxl/0plso0IKX7mqXWCLIlq0qEW4d19Qi6BLCELwEgpvQbyAVrroCrSNUJFGAyrkEEEMNs5PCxtRHGsZneX7nedwzgd/LQngObfnykIQOj9Disd/BFxdZ3hVwtE0Mje3kuw9OJqGWSji1BtzYafeGH...
How are Python's Built In Dictionaries Implemented?
...49)
When adding entries to the table, we start with some slot, i, that is based on the hash of the key. CPython initially uses i = hash(key) & mask (where mask = PyDictMINSIZE - 1, but that's not really important). Just note that the initial slot, i, that is checked depends on the hash of the k...
Unable to load DLL (Module could not be found HRESULT: 0x8007007E)
...
Current Directory
System folder, C:\windows\system32 or c:\windows\SysWOW64 (for 32-bit process on 64-bit box).
Reading from the Path environment variable
In addition I'd check the dependencies of the DLL, the dependency walker provided with Visual Studio can help you out here, it can also be do...