大约有 7,000 项符合查询结果（耗时：0.0212秒） [XML]
Approximate cost to access various caches and main memory?
...s at 8Gbps per serial lane, enabling a 48-lane switch to handle a whopping 96 GBytes/sec. of full duplex peer to peer traffic. [I:]
|
| ~810 [ns] + InRam-"Network" / many-to-many parallel CPU/Memory "message" passing with less than 810 ns latency any-to-any
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| |||||||||||||||||...
AtomicInteger lazySet vs. set
...rve as a soft barrier costing 20 cycles on nehelem intel cpu)
on x86 (x86_64) such a barrier is much cheaper performance-wise than volatile or AtomicLong getAndAdd ,
In an one producer, one consumer queue scenario, xchg soft barrier can force the line of codes before the lazySet(sequence+1) for p...
How does this code generate the map of India?
... while (a != 0) {
a = bits[b];
b++;
while (a > 64) {
a--;
if (++c == 'Z') {
c /= 9;
putchar(c);
} else {
putchar(33 ^ (b & 0x01));
}
}
}
return 0;
}
The s...
How to convert an array of strings to an array of floats in numpy?
...port numpy as np
a = ["1.1", "2.2", "3.2"]
b = np.asarray(a, dtype=np.float64, order='C')
For Python 2*:
print a, type(a), type(a[0])
print b, type(b), type(b[0])
resulting in:
['1.1', '2.2', '3.2'] <type 'list'> <type 'str'>
[1.1 2.2 3.2] <type 'numpy.ndarray'> <type 'num...
What is the HEAD in git?
...0
Maroun
84k2323 gold badges167167 silver badges218218 bronze badges
answered Mar 27 '10 at 16:20
pokepoke
...
Referring to the null object in Python
...
96
why didnt the python designers just choose "null". Just have to be different don't you ! ;)
– Vidar
...
Java HashMap performance optimization / alternative
...71
23850.695
22299.22
20998.006
19797.799
18702.951
17702.434
16832.182
16084.52
15353.083
Using the new method gives:
337837.84
337268.12
337078.66
336983.97
313873.2
317460.3
317748.5
320000.0
309704.06
310752.03
312944.5
265780.75
275540.5
264350.44
273522.97
270910.94
279008.7
276285.5
283455...
Undefined, unspecified and implementation-defined behavior
...
AraKAraK
84.6k3232 gold badges170170 silver badges228228 bronze badges
...
Programmatically retrieve memory usage on iPhone
...mach_task_basic_info. My guess is that this version is not compatible with 64-bit architecture, but not really sure.
– cprcrack
Oct 30 '13 at 18:16
14
...
How to find where gem files are installed
...MS VERSION: 2.1.5
- RUBY VERSION: 2.0.0 (2013-06-27 patchlevel 247) [x86_64-darwin12.4.0]
- INSTALLATION DIRECTORY: /Users/ttm/.rbenv/versions/2.0.0-p247/lib/ruby/gems/2.0.0
- RUBY EXECUTABLE: /Users/ttm/.rbenv/versions/2.0.0-p247/bin/ruby
- EXECUTABLE DIRECTORY: /Users/ttm/.rbenv/versions/2...