大约有 115 项符合查询结果（耗时：0.0268秒） [XML]
How do you determine the ideal buffer size when using FileInputStream?
...4288 lengths. Well, you may win 10-20ms if you switch between small buffer 4Kb and big buffer 524Kb depending on the file size but it's not worth it. So 524 Kb was the best option in my case.
– Kirill Karmazin
Oct 25 '18 at 12:39
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bpftrace教程【官方】 - 操作系统(内核) - 清泛网 - 专注C/C++及内核技术
... 22 |@@@@@@@ |
[2k, 4k) 1 | |
[4k, 8k) 10 |@@@ |
[8k, 16k) 1 | ...
Virtual Memory Usage from Java under Linux, too much memory used
...[ anon ]
000000072aab0000 2097152K rwx-- [ anon ]
00000007aaab0000 349504K rwx-- [ anon ]
00000007c0000000 1048576K rwx-- [ anon ]
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00007fa1ed00d000 1652K r-xs- /usr/local/java/jdk-1.6-x64/jre/lib/rt.jar
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00007fa1ed1d3000 1024K rwx-- [ anon ]
00007fa1ed2d3000 4K ----- ...
use localStorage across subdomains
...oing this, why not just use the cookies directly? Depends on your context.
4K max cookie size, total across all cookies for the domain (Thanks to Blake for pointing this out in comments)
I agree with other commenters though, this seems like it should be a specifiable option for localStorage so wor...
Access object child properties using a dot notation string [duplicate]
...r);
console.log(value);
Update
(thanks to comment posted by TeChn4K)
With ES6 syntax, it is even shorter
var r = { a:1, b: {b1:11, b2: 99}};
var s = "b.b2";
var value = s.split('.').reduce((a, b) => a[b], r);
console.log(value);
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Maximum on http header values?
...L header fields (so keep your cookies short).
Apache 2.0, 2.2: 8K
nginx: 4K - 8K
IIS: varies by version, 8K - 16K
Tomcat: varies by version, 8K - 48K (?!)
It's worth noting that nginx uses the system page size by default, which is 4K on most systems. You can check with this tiny program:
pagesi...
mmap() vs. reading blocks
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Dietrich EppDietrich Epp
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dd: How to calculate optimal blocksize? [closed]
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Boiethios
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answered May 28 '11 at 13:21
user25148user2514...
内存优化总结:ptmalloc、tcmalloc和jemalloc - 操作系统(内核) - 清泛网 - ...
...che分配，大对象从CentralCache分配。大对象分配的空间都是4k页面对齐的，多个pages也能切割成多个小对象划分到ThreadCache中。
小对象有将近170个不同的大小分类(class)，每个class有个该大小内存块的FreeList单链表，分配的时候先找...
Http长连接200万尝试及调优 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...使内存占用尽量减少，我将Nginx的request_pool_size从默认的4k改成1k了。另外，net.ipv4.tcp_wmem与net.ipv4.tcp_rmem中的默认值也设置成4k。
两百万连接时，通过nginx的监控得到数据：
两百万连接时系统内存情况：
Http comet 长连接