Java – BitcoinJ: the sync speed, 150 blocks per second is normal?

I would like to implement a web wallet. so I'm trying to put full blockchain in the MySQL store. I have Bitcoin Core installed and I configured a BitconJ Java program to connect to my local Bitcoin Core. But I only get 3 ~ 150 blocks / second, which seems slow. Is there any way to speed up the blockchain download? and here is my code that downloads the complete blockchain in the MySQL store.

public class MySQLDB {

    public static void main(String() args) throws BlockStoreException, UnknownHostException {
        FullPrunedBlockStore store = new MySQLFullPrunedBlockStore(TestNet3Params.get(), 10,
                "localhost", "btc_test", "myname", "my-password");

        FullPrunedBlockChain vChain = new FullPrunedBlockChain(TestNet3Params.get(), store);
        vChain.setRunScripts(false);

        PeerGroup vPeerGroup = new PeerGroup(TestNet3Params.get(), vChain);
        vPeerGroup.setUseLocalhostPeerWhenPossible(true);
        vPeerGroup.addAddress(InetAddress.getLocalHost());

        vPeerGroup.start();
        vPeerGroup.downloadBlockChain();
    }
}

How can I change the speed at which Gmail searches for new emails?

How can I change the speed at which Gmail searches for new emails?

I realized that when I receive a new email in my Gmail account, it sometimes takes me up to 15 minutes for the notification to appear on my phone (Samsung Galaxy s9, Android 9).

google chrome – Site page loading speed

I can't understand why in the Safari browser on Mac the pages of the site load 2-3 times faster than in Chrome.
The difference in speed is very large. And it doesn't depend on filling the page with graphics, etc. Here is an example of different pages on the site, I observe the same delay in all:

https://pure.dating/article/14-free-dating-sites-with-no-sign-up/

https://pure.dating/article/16-trans-dating-apps-that-really-work/

https://pure.dating/article/craigslist-personals-alternative-review-15-top-casual-date-websites/

https://pure.dating/article/15-best-sex-dating-sites-which-help-you-get-a-mind-blowing-experience/

https://pure.dating/article/review-the-best-gay-dating-apps-and-where-to-find-them/

https://pure.dating/article/10-best-free-dating-websites-for-love-friendship-and-casual-encounter/

https://pure.dating/article/17-hookup-apps-that-will-definitely-give-you-what-you-want/

I want to understand: is this normal? Or can I somehow optimize the code for Chrome?

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How to add site speed over the user table in Google Analytics?

I am seeing a default "audience" chart, which shows the total number of users per day, how can I add data on that chart to see the average page speed?

To be able to see the total number of users per day against the average loading time of the page and decide if there is a correlation.

ai – Move Unity NavMeshAgent at a constant speed

My NavMeshAgent randomly changes speed while moving along its route. It seems to be slower when a segment of a road is shorter (between two landmarks / corners) or when there are many continuous corners nearby ahead. I tried changing the acceleration and angular velocity, but that didn't work. I also tried to change the agent.speed and, although I set it to vectors of the same magnitude in each frame, it still does not move at a constant speed. I have also checked if everything is in the same coordinates And since my game is from top to bottom spelling.

What is the best metric to decide the speed of the page?

What is the best metric to decide the speed of the page?

How to speed up Lightroom face detection

I am using Lightroom (Windows) to tag all my images using face detection, however, I have 80,000 images and it goes very, very slowly. When looking at the task manager, it seems to process an image and then have the CPU idle for 8 or 9 seconds. Any idea what the bottleneck could be? Or something to accelerate this? I guess LR simply doesn't have a good face detection pipe (for example, queuing images or parallelizing processing).

My images / lrcatalog / cache are all in a large NVME SSD. Below is a screenshot of the task manager. After noting that the GPU did the same with the CPU, I deactivated the use of the GPU just in case the transfer of data from the CPU to the GPU caused problems but did not help. Unit C is the main unit with all the data.

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flash: why can't I get high speed sync with my Nikon D750 and Yongnuo YN560 IV?

For a camera to work with Nikon HSS, its specifications must say HSS and must say "for Nikon." So, the reason is that the Yongnuo YN560 IV specification doesn't mention either, so forget HSS that way. That model is a manual flash.

A model like the Yongnuo YN-568 III (the "for Nikon") has HSS in its specifications, and is expected to work. Then the camera can communicate with it and can set the HSS mode if selected (with a camera model such as the D750 that is also compatible with HSS).

yongnuo: I bought a speed light yn560 Iv for my 2000d canon but it doesn't work with the camera, what can I do now?

My canon 2000d is not firing the speed light yn560 iv. Is there any way to use this combination of camera and flash? What would be the most economical and useful way to update my system?

Edit:
The possible duplicate does not answer my question, it just tells me that this flash is not compatible with the camera. Unfortunately, I already discovered it when it didn't work.