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Utilizing multi core for tar+gzip/bzip compression/decompression
... for pigz decompression are used for reading, writing, and calculating the CRC. When compressing on the other hand, pigz gets close to a factor of n improvement with n cores.
– Mark Adler
Feb 20 '13 at 16:18
...
Rails raw SQL example
...condition:
my_instances = MyModel.where.not(attribute_a: nil) \
.where('crc32(attribute_b) = ?', slot) \
.select(:id)
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Nginx缓存解决方案：SRCache - 更多技术 - 清泛网 - 专注C/C++及内核技术
...shared.phoenix_status)
local key = ngx.var.arg_key
local index = ngx.crc32_long(key) % #phoenix["memcached"] + 1
local config = phoenix["memcached"][index]
local default = phoenix["memcached"]["default"]
local host = config["host"] or default["host"]
local port = config...
uint8_t vs unsigned char
...e readable */
uint32_t sequence_no;
uint8_t data[8];
uint32_t crc32;
} s_mypacket __attribute__((packed));
#pragma pack()
Which method you use depends on your compiler. You may also need to support several different compilers with the same header files. This happens in embedded system...
What is a correct mime type for docx, pptx etc?
...: "application/vnd.syncml.dm+xml", "sv4cpio": "application/x-sv4cpio", "sv4crc": "application/x-sv4crc", "sbml": "application/sbml+xml", "tsv": "text/tab-separated-values", "tiff": "image/tiff", "tao": "application/vnd.tao.intent-module-archive", "tar": "application/x-tar", "tcl": "application/x-tcl...
Why can't C compilers rearrange struct members to eliminate alignment padding? [duplicate]
...ure;
uint16_t minVersion, flag, method, modTime, modDate;
uint32_t crc32, compressedSize, uncompressedSize;
uint16_t nameLength, extraLength;
};
The packed attribute prevents the compiler from aligning the fields according to their natural alignment, and it has no relation to the probl...
Phonegap Cordova installation Windows
...)
├── express@3.0.0 (methods@0.0.1, fresh@0.1.0, range-parser@0.0.4, crc@0.2.0, cookie@0.0.4, commander@0.6.1, debug@0.7.2, mkdirp@0.3.3, send@0.1.0, connect@2.6.0)
├── ripple-emulator@0.9.18 (connect-xcors@0.5.2, colors@0.6.0-1, accounting@0.3.2, request@2.12.0, moment@1.7.2, express@3....
Multiprocessing vs Threading Python [duplicate]
...tel Core i7-7820HQ CPU (4 cores / 8 threads), RAM: 2x Samsung M471A2K43BB1-CRC (2x 16GiB), SSD: Samsung MZVLB512HAJQ-000L7 (3,000 MB/s).
Visualize which threads are running at a given time
This post https://rohanvarma.me/GIL/ taught me that you can run a callback whenever a thread is scheduled wit...
How can I decompress a gzip stream with zlib?
..._DATA_ERROR). If a gzip stream is being decoded, strm->adler is
a crc32 instead of an adler32.
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What do the terms “CPU bound” and “I/O bound” mean?
...tel Core i7-7820HQ CPU (4 cores / 8 threads), RAM: 2x Samsung M471A2K43BB1-CRC (2x 16GiB) I get results like this:
Plot data.
Note that there is a lot of variance between run however. But I can't increase the array size much further since I'm already at 8GiB, and I'm not in the mood for statistics ...