Using [`this`](https://developer.chrome.com/extensions/webRequest) document, the `Caching` section in particular, I understand that there are two caches, `an on-disk cache and a very fast in-memory cache`.

As for your actual question, how does Chrome decide what gets cached where, I believe the next line provides the answer

&gt; The lifetime of an in-memory cache is attached to the lifetime of a render process, which roughly corresponds to a tab

While I am not entirely sure, I believe the in memory cache serves the current tab.

I was running an app in the Google Play in Beta and then just recently &quot;released to production&quot; using a higher version APK.

However when I go to Google Play listing my app still says AppName (Beta)? I thought it just needed some time to propagate but I made the change 2 days ago and its still showing like that.

Anyone know how to correct this?


Promoted by app to production but still says (Beta)

The Code folding option in RMarkdown for html documents is awesome. That option makes the programmatic methodology transparent for those who are interested, without forcing the audience to scroll through miles of code. The tight placement of code with prose and interactive graphical output makes the whole project more accessible to a wider audience, and furthermore it reduces the need for additional documentation. 

For a larger project, I&#39;m using bookdown, and it works great. The only problem is that there is no code-folding option. 
Code folding is not currently enabled in bookdown. (see https://stackoverflow.com/questions/39947867/enable-code-folding-in-bookdown )

I know I don&#39;t need an option to make it happen. I just need to paste the right code in the right place or places. But what code and where?

A viable alternative would be to put the code chunk below the chunk&#39;s outputs in the page. Or, finally, to put them as an appendix. I could do that with html but not reproducible like rbookdown.

Code folding in bookdown

I knew that chrome supports `from memory cache` and `from disk cache` when I request resources. However, I didn&#39;t see `from memory cache` before. 

How does chrome determine which resources should be cached in memory?

[![enter image description here][1]][1]


  [1]: https://i.stack.imgur.com/G53Uc.png

How chrome browser determine memory cache and disk cache?

I knew that chrome supports <code>from memory cache</code> and <code>from disk cache</code> when I request resources. However, I didn't see <code>from memory cache</code> before.
How does chrome determine which resources should be cached in memory?
<a href="https://i.stack.imgur.com/G53Uc.png" target="_blank" rel="noopener noreferrer"><img src="https://i.stack.imgur.com/G53Uc.png" alt="enter image description here"></a>

I&#39;m using python-selenium and Chrome 59 and trying to automate a simple download sequence. When I launch the browser normally, the download works, but when I do so in headless mode, the download doesn&#39;t work.

    # Headless implementation
    from selenium import webdriver

	chromeOptions = webdriver.ChromeOptions()
	chromeOptions.add_argument(&quot;headless&quot;)

	driver = webdriver.Chrome(chrome_options=chromeOptions)

	driver.get(&#39;https://www.mockaroo.com/&#39;)
	driver.find_element_by_id(&#39;download&#39;).click()
    # ^^^ Download doesn&#39;t start


----------

    # Normal Mode
    from selenium import webdriver

    driver = webdriver.Chrome()
    
	driver.get(&#39;https://www.mockaroo.com/&#39;)
	driver.find_element_by_id(&#39;download&#39;).click()
    # ^^^ Download works normally


----------

I&#39;ve even tried adding a default path:

    prefs = {&quot;download.default_directory&quot; : &quot;/Users/Chetan/Desktop/&quot;}
    chromeOptions.add_argument(&quot;headless&quot;)
    chromeOptions.add_experimental_option(&quot;prefs&quot;,prefs)

Adding a default path works in the normal implementation, but the same problem persists in the headless version.

How do I get the download to start in headless mode?


Downloading with chrome headless and selenium

I am using [Puppeteer][1] to try to take a screenshot of a website after all images have loaded but can&#39;t get it to work.

Here is the code I&#39;ve got so far, I am using https://www.digg.com as the example website:

    const puppeteer = require(&#39;puppeteer&#39;);
    
    (async () =&gt; {
        const browser = await puppeteer.launch();
        const page = await browser.newPage();
        await page.goto(&#39;https://www.digg.com/&#39;);
    
        await page.setViewport({width: 1640, height: 800});
    
        await page.evaluate(() =&gt; {
            return Promise.resolve(window.scrollTo(0,document.body.scrollHeight));
        });
    
        await page.waitFor(1000);
    
        await page.evaluate(() =&gt; {
            var images = document.querySelectorAll(&#39;img&#39;);
    
            function preLoad() {
    
                var promises = [];
    
                function loadImage(img) {
                    return new Promise(function(resolve,reject) {
                        if (img.complete) {
                            resolve(img)
                        }
                        img.onload = function() {
                            resolve(img);
                        };
                        img.onerror = function(e) {
                            resolve(img);
                        };
                    })
                }
    
                for (var i = 0; i &lt; images.length; i++)
                {
                    promises.push(loadImage(images[i]));
                }
    
                return Promise.all(promises);
            }
    
            return preLoad();
        });
    
        await page.screenshot({path: &#39;digg.png&#39;, fullPage: true});
    
        browser.close();
    })();


  [1]: https://github.com/GoogleChrome/puppeteer

Puppeteer wait for all images to load then take screenshot

On my Windows PC, i have anaconda installed and when I open a jupyter notebook, it opens up in internet explorer, but I would like to use Chrome instead. Does anyone know how to achieve this?

how to open Jupyter notebook in chrome on windows

I get this error:

 &gt; Failed to load module script: The server responded with a non-JavaScript MIME type of &quot;&quot;. Strict MIME type checking is enforced for module scripts per HTML spec.

The project is run from local files, eg.: `file:///D:/path/project.html`.

Works without problems in Firefox, but doesn&#39;t work in Google Chrome. I want to test it this way for development purposes - it&#39;s more comfortable than creating a server and remembering what port is it on.

ES6 modules in local files - The server responded with a non-JavaScript MIME type

All of a sudden I seem to have an issue with Google Chrome using localhost.

I&#39;m trying to access any of my development sites (using Ampps) and I get the following error:-

&gt; Your connection is not private Attackers might be trying to steal your
&gt; information from website.dev (for example, passwords, messages
&gt; or credit cards). Learn more NET::ERR_CERT_AUTHORITY_INVALID

When I visit any of the dev sites it is redirecting from http://website.dev to https://website.dev automatically. I&#39;m not having any issue in Safari or Firefox so I don&#39;t understand what is going on.

I&#39;ve tried re-installing Google Chrome, resetting it to the factory default settings...

I think it could be an issue with Keychain Access --&gt; Certificates but wouldn&#39;t that mean it wouldn&#39;t work in Firefox and Safari if that was the case?

I&#39;ve spent a while trying to find a solution but so far nothing has worked so I would appreciate some suggestions on how I can fix this. I can&#39;t even proceed passed this warning as I don&#39;t get the proceed link (insecure) as shown below:-

[![enter image description here][1]][1]


  [1]: https://i.stack.imgur.com/m4P98.png

Google Chrome localhost | NET::ERR_CERT_AUTHORITY_INVALID

When I updated my site, run npm run build and upload the new files to the server I am still looking the old version of my site. 


Without React, I can see the new version of my site with cache-busting. I do this: 

Previous file 

    &lt;link rel=&quot;stylesheet&quot; href=&quot;/css/styles.css&quot;&gt;

New file 

    &lt;link rel=&quot;stylesheet&quot; href=&quot;/css/styles.css?abcde&quot;&gt;

How can I do something like this or to achieve cache busting with create react app?

There are many threads in the GitHub of create react app about this but no one has a proper/simple answer.  




  [1]: https://github.com/Alfrex92/serverlessapps

Cache busting with CRA React

**Especially** when using recursive code there are massive improvements with `lru_cache`.       I do understand that a cache is a space that stores data that has to be served fast and saves the computer from recomputing.

How does the **Python** `lru_cache` from functools work internally? 

I&#39;m Looking for a specific answer, does it use dictionaries like the rest of Python? Does it only store the `return` value?

I know that **Python** is heavily built on top of dictionaries, however, I couldn&#39;t find a specific answer to this question. Hopefully, someone can simplify this answer for all the users on ***StackOverflow***.



How does Lru_cache (from functools) Work?

I&#39;m hoping to get my `pip install` instructions inside my `docker build`s as fast as possible.

I&#39;ve read [many](https://www.aptible.com/documentation/deploy/tutorials/faq/dockerfile-caching/pip-dockerfile-caching.html) [posts](https://vsupalov.com/speed-up-python-docker-image-build/) explaining how adding your `requirements.txt` before the rest of the app helps you take advantage of Docker&#39;s own image cache if your `requirements.txt` hasn&#39;t changed. But this is no help at all when dependencies do change, even slightly.

The next step would be if we could use a consistent pip cache directory. By default, `pip` will cache downloaded packages in `~/.cache/pip` (on Linux), and so if you&#39;re ever installing the same version of a module that has been installed before anywhere on the system, it shouldn&#39;t need to go and download it again, but instead simply use the cached version. If we could leverage a shared cache directory for docker builds, this could help speed up dependency installs a lot.

However, there doesn&#39;t appear to be any simple way to mount a volume while running `docker build`. The build environment seems to be basically impenetrable. I found [one article](https://medium.com/@scythargon/cache-for-python-pip-downloads-and-wheels-in-docker-67f24e7cd84e) suggesting a genius but complex method of running an `rsync` server on the host and then, with a hack inside the build to get the host IP, rsyncing the pip cache in from the host. But I&#39;m not relishing the idea of running an rsync server in Jenkins (which isn&#39;t the most secure platform at the best of times).

Does anyone know if there&#39;s any other way to achieve a shared cache volume more simply?

Using a pip cache directory in docker builds

In the following code, I create two lists with the same values: one list unsorted (s_not), the other sorted (s_yes). The values are created by randint(). I run some loop for each list and time it.

```
import random
import time

for x in range(1,9):

    r = 10**x # do different val for the bound in randint()
    m = int(r/2)

    print(&quot;For rand&quot;, r)

    # s_not is non sorted list
    s_not = [random.randint(1,r) for i in range(10**7)]

    # s_yes is sorted
    s_yes = sorted(s_not)

    # do some loop over the sorted list
    start = time.time()
    for i in s_yes:
        if i &gt; m:
            _ = 1
        else:
            _ = 1
    end = time.time()
    print(&quot;yes&quot;, end-start)

    # do the same to the unsorted list
    start = time.time()
    for i in s_not:
        if i &gt; m:
            _ = 1
        else:
            _ = 1
    end = time.time()
    print(&quot;not&quot;, end-start)

    print()
```

With output:
```
For rand 10
yes 1.0437555313110352
not 1.1074268817901611

For rand 100
yes 1.0802974700927734
not 1.1524150371551514

For rand 1000
yes 2.5082249641418457
not 1.129960298538208

For rand 10000
yes 3.145440101623535
not 1.1366300582885742

For rand 100000
yes 3.313387393951416
not 1.1393756866455078

For rand 1000000
yes 3.3180911540985107
not 1.1336982250213623

For rand 10000000
yes 3.3231537342071533
not 1.13503098487854

For rand 100000000
yes 3.311596393585205
not 1.1345293521881104
```
So, when increasing the bound in the randint(), the loop over the sorted list gets slower. Why?


Why is Python list slower when sorted?

I have a VueJS app. Whenever I run `npm run build` it creates a new set of `dist/*` files, however, when I load them on the server (after deleting the old build), and open the page in browser, it loads the old build (from cache i assume). When I refresh the page, it loads the new code no problem.

This is my index.html:

    &lt;!DOCTYPE html&gt;
    &lt;html lang=&quot;en&quot;&gt;
    	&lt;head&gt;
    		&lt;meta http-equiv=&quot;Content-Type&quot; content=&quot;text/html;charset=UTF-8&quot;/&gt;
    		&lt;meta name=&quot;viewport&quot; content=&quot;width=device-width, initial-scale=1, maximum-scale=1&quot;/&gt;
    		&lt;meta http-equiv=&quot;cache-control&quot; content=&quot;max-age=0&quot; /&gt;
    		&lt;meta http-equiv=&quot;cache-control&quot; content=&quot;no-cache&quot; /&gt;
    		&lt;meta http-equiv=&quot;expires&quot; content=&quot;-1&quot; /&gt;
    		&lt;meta http-equiv=&quot;expires&quot; content=&quot;Tue, 01 Jan 1980 1:00:00 GMT&quot; /&gt;
    		&lt;meta http-equiv=&quot;pragma&quot; content=&quot;no-cache&quot; /&gt;
    		&lt;link rel=&quot;stylesheet&quot; href=&quot;/static/css/bootstrap.min.css&quot;/&gt;
    	&lt;/head&gt;
    	&lt;body&gt;
    		&lt;div id=&quot;app&quot;&gt;&lt;/div&gt;
    	&lt;/body&gt;
    &lt;/html&gt;

Is there a way to force it to load new code every time or (ideally) to check if the old files are gone from the server, then refresh the browser?

VueJS/browser caching production builds

ES6 modules allows us to create a single point of entry like so:

&lt;!-- begin snippet: js hide: false console: true babel: false --&gt;

&lt;!-- language: lang-js --&gt;

    // main.js

    import foo from &#39;foo&#39;;

    foo()

&lt;!-- language: lang-html --&gt;

    &lt;script src=&quot;scripts/main.js&quot; type=&quot;module&quot;&gt;&lt;/script&gt;

&lt;!-- end snippet --&gt;


**foo.js** will be stored in the browser cache. This is desirable until I push a new version of **foo.js** to production. 

It is common practice to add a query string param with a unique id to force the browser to fetch a new version of a js file (**foo.js?cb=1234**)

How can this be achieved using the es6 module pattern?

Content Type	Original Author	Original Content on Stackoverflow
Question	gentlejo	View Question on Stackoverflow
Solution 1 - Google Chrome	mayk93	View Answer on Stackoverflow

How chrome browser determine memory cache and disk cache?

Google Chrome Problem Overview

Google Chrome Solutions

Solution 1 - Google Chrome

Code folding in bookdown

Promoted by app to production but still says (Beta)

Attributions