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CentOS How to use Linux command line to test network speed/bandwidth

What Linux commands can be used in CentOS7.6 to test the network speed or bandwidth of the cloud server?

想无 2021-12-31 16:35:04

mysql query slows down after website is uploaded to server

The speed of opening the homepage in the local test is about 4900ms. After uploading to the server and setting up the homepage, the speed of opening the homepage becomes 29000ms. The speed of opening the homepage when testing to cancel the mysql query on the server is 400ms. All problems judged to b...

按键盘手指磨破皮 2017-10-05 17:09:57

javascript - Regarding the problem of HighMaps rendering very slowly under IE8

I used highMaps to make a map of China with the following style: The rendering is very slow under IE8, but the speed is acceptable under chrome. I would like to ask what is the problem and is there any way to test the rendering time of highcharts?

高洛峰 2017-06-26 10:54:28

JavaScript updates CSS custom properties slower than using element styles: performance comparison

I've created a calendar slider for vue3 that uses mousemove and touchmove events to implement the sliding animation, as well as functions to perform some speed animations. The project can be tested here: https://stackblitz.com/github/Der-Alex/vue-calendar-slider?file=src/components/VueCalendarSlider...

P粉235202573 2024-01-07 09:42:03

How to solve the problem that vim starts slowly after installing the plug-in?

After installing some plug-ins, I found that the startup speed of vim was significantly slower. Use the following command to test {code...} and see that the plug-in as shown above takes the longest to load. Is there any way to solve this problem?

習慣沉默 2017-05-16 16:37:58

What is the reason why the server cannot ping?

The ping value of the network, that is, the time value, reflects the time required for the entire process of sending a request from the local machine to the remote server. After the remote server receives the request, it returns a confirmation signal to the local machine. The unit is ms. The larger ...

七秒 2021-10-22 14:32:16

WeChat official account payment problem of obtaining openid

When doing WeChat payment, I used the downloaded demo for testing. One problem is that clicking 'jsapi payment' jumps to the payment page very slowly. After debugging, I found that the speed is only slow when the getopenid() method is called. , has anyone encountered this problem? Does anyone know h...

手机用户992221094 2018-08-15 20:18:40

phpStudy apache + mysql is waiting for the response of x.x.x.x.. Problem.

Please give me some advice if you encounter a problem recently: The apache+mysql environment built by win7-64-bit phpStudy has always been used well. Recently, when I opened the test webpage, it suddenly showed "Waiting for response from x.x.x.x..." in the status bar, and the browsing spee...

张列 2018-10-29 10:57:34

Prevent MySQL from reading when updating

I have two simple queries, one to read the table and one to update the table. How to lock the read of a select query while the update query is running. Now in MySQLInnoDB, I noticed that writes/updates are locked by default, but reads/selects get the old data before the transaction. I tried using a ...

P粉190883225 2023-11-07 18:05:53

Ways to fix issue 2003 (HY000): Unable to connect to MySQL server 'db_mysql:3306' (111)

I recently tried to containerize my FastAPIPython server (also for replication/doubling purposes). Before, I had just a MySQL server in a Docker container and everything was fine, but when I also made my web server a service, it couldn't connect to the MySQL server, so now the application doesn't wo...

P粉178132828 2023-09-05 11:18:47

Experiment with sorting after query limit

So this is my first question here, please forgive me if something is wrong. I'm trying to make a sort query based on constraints. So there is a Customers table with 90 records. I want to first perform a query limited to 3 records, and then sort the results of this query by a column called ContactNam...

P粉237125700 2023-09-05 14:46:42

CSS Grid: Create new row when child content overflows column width

I have a two column layout based on CSS grid. When the content of the second column exceeds 1fr I want to create a new row. As it currently stands, the content simply overflows the column. One requirement of this layout is that the items in the right menu column are in one row. I achieve this with: ...

P粉212114661 2023-09-05 15:18:28

PHP full text search functionality using AND, OR and NOT operators

Newbie question: I'm trying to implement a full text search on a search string using php and eloquent. $searchstring="+(victimsuspect)+crime-covid";$searchresult=RssItem::whereRaw("MATCH(description)AGAINST('$searchstring'INBOOLEANMODE)")->ge

P粉076987386 2023-09-05 15:06:32

Shortest way to convert all PHP types to string

I'm writing a general system that I hope can one day be applied to fields like medicine (i.e. it's "scientific"). I think the best way is to represent all the data in php with strings (true will be "true", false will be "false" and so on). The reason for this is that in...

P粉369196603 2023-09-05 15:34:44

How to get average of DATETIME column in MySQL while grouping by other columns

I'm creating and populating a MySQL table using the following query: SETtime_zone='+00:00';CREATETABLEtimestamp_n_datetime(idINT,timeDATETIME,avg_timeDATETIME);INSERTINTOtimestamp_n_datetime(id,time,avg_time)VALUES("1","2023-01-0310:

P粉460377540 2023-09-05 11:46:21

Multi-device (mobile phone) synchronization - React Native

I'm trying to create a Lightshow that will launch on all users' mobile devices at the same time (can have up to 2000-3000 users). All users will use the Internet (Wi-Fi or mobile data). In our FE we use Apollo for subscriptions and it works like a charm. But the problem is, user A can get subscribed...

P粉151466081 2023-09-05 11:58:38

Spades, Diamonds, Hearts, Clubs => styles do not change font color in Chrome for Android

In Google Chrome on Windows, the card suit symbols (spades, hearts, diamonds, clubs) are colored correctly using the "style" attribute. Unfortunately, the same page displayed in Google Chrome on Android does not display the colors I defined but uses the default black and red. (See the atta...

P粉896751037 2023-09-05 15:25:13

How to hide mui TextField label?

I'm developing a Nextjs app and I have a dashboard navigation bar built with mui that contains a notification that opens the notification box, which is built with regular HTML and CSS. dashboard-navbar.js: importNotificationBoxfrom"./notification-box/notification-box";//...exportconstDashb...

P粉239164234 2023-09-05 15:41:00