Tag：performance
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Time：2021-4-20
distributed system As a programmer in the 21st century, it seems that he does not have a female ticket when he has not heard of distributed system. Whether it’s going out for an interview to blow water with the interviewer, or at work with colleagues, distributed system is always your superior chip. Distributed system has […]
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Time：2021-4-19
This article will show you how to use explain to analyze a SQL. In fact, there are many articles on the Internet that introduce the use of explain in detail. This article combines examples and principles to let you have a better understanding as far as possible. Believe me, you should have a special harvest […]
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Time：2021-4-17
preface This series is derived from”Manong turns over”The reading activities initiated by the knowledge planet are organized by the [email protected] UDP doesn’t lose packetsWe abandoned the traditional books and began to introduce the top graduate course < 6.824 >, which is the inventor of worm virus many years agoRobert MorrisThe big man teaches, belongs toMITThe […]
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Time：2021-4-16
In this series, we will discuss how to measure Linux performance correctly. Linux performance is a very broad topic, so we will focus on the four main resources that usually improve system performance — CPU, memory, disk storage and network. On the memory side, let’s look at physical memory and virtual memory. Virtual memory is […]
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Time：2021-4-14
introduction Most of the people who have used the database know the similarities and differences between the functions of like and = signs 1, difference: like can be used as fuzzy query, but ‘=’ does not support this function. For example, query the data whose first letter of field ID in info table is 1 […]
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Time：2021-4-8
The original text is transferred from:https://blog.csdn.net/lovesoo… Apache JMeter is a pure Java programming load function testing and performance testing open source tool software. Compared with LoadRunner, JMeter is small, light and free, and has gradually become a mainstream performance testing tool. It is one of the tools that every tester must master. This article is […]
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Time：2021-4-6
According to the release plan, PHP 8 will be released on November 26 this year, and the first alpha version originally scheduled to be released on June 18 has been released today Download address: https://downloads.php.net/~po… PHP 8 is a new major version, which introduces some major changes, as well as many new features and performance […]
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Time：2021-4-6
After reading Alibaba aliflutter client R & D system Flutter is an open source UI toolkit, which can help developers build multi platform applications efficiently through a set of code base, supporting mobile, web, desktop and embedded platforms. The flutter component is built with modern responsive framework, and the main idea is to build UI […]
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Time：2021-4-3
Random forest is a common machine learning algorithm, which can be used in both classification and regression problems. In this paper, we compare and test the implementation of random forest algorithm on four platforms: scikit learn, spark mllib, dolphin dB and xgboost. The evaluation indexes include memory occupation, running speed and classification accuracy. This test […]
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Time：2021-4-3
Elasticsearch is a very popular log retrieval and analysis tool, especially in real-time, scalability, ease of use and full-text retrieval has a very excellent comprehensive performance. There is an article on Zhihu,Golion: dimension reduction strike! Using elasticsearch as temporal dataLibrary, and achieved very good results. Many users can’t help asking whether elasticsearch can be used […]
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Time：2021-4-3
In this series, we will discuss Linux performance measurement and how to measure it correctly. Linux performance is a very broad topic, so we will focus on the four main resources that usually improve system performance — CPU, memory, disk storage and network.On the network side, we should look at three things: bandwidth, latency, and […]
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Time：2021-4-2
PHP guomi SM3 signature algorithm Code address github.com/lizhichao/sm install composer require lizhichao/one-sm use require __ DIR__ . ‘/vendor/ autoload.php ‘; performance testing andopenssl , SM3-PHPperformance testing php bench.php result openssl:c4cae8d8730206d130e1eef9de3e00225da0b556cfcb8d0076561352ff19f769 one-sm3:c4cae8d8730206d130e1eef9de3e00225da0b556cfcb8d0076561352ff19f769 SM3-PHP:c4cae8d8730206d130e1eef9de3e00225da0b556cfcb8d0076561352ff19f769 openssl time:4.8391819000244ms one-sm3 time:5.7239532470703ms SM3-PHP time:684.2360496521ms Test code bench.php php This work adoptsCC agreementReprint must indicate the author and the link of this […]
