ybc | Fast in-process BLOB cache with persistence support | Caching library
kandi X-RAY | ybc Summary
kandi X-RAY | ybc Summary
YBC - Yet another Blob Cache library. This library implements fast in-process blob cache with persistence support. Q: Give me performance numbers! A: Well, YBC achieves 25.8 Mops/s for get() calls and 5.8 Mops/s for set() calls on my not-so-fast laptop with 2.50GHz Intel i5 CPU when running in 4 threads. Q: Does YBC work with /dev/shm/ ? A: Yes. Just create data and index files on /dev/shm . This will completely eliminate page swapping at the cost of potential data loss on power failure or computer reboot. Q: Is this yet another boring cache implementation? A: No. YBC is designed for modern OSes running on modern hardware. It takes advantage of OS’s and computer’s hardware features, while simultaneouly avoiding their weaknesses. This results in high performance and low resource usage. Read 'Features' chapter for more details.
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QUESTION
I did a small benchmarking to compare quantum version of algorithm to its classical version, and I found that quantum computing taking so much time in comparison to classical version.
I don't understand why its happening, it should be either similar to classical or better.
DataSet Explanation: 1 test data point and 3 training data points, dimension = 2. Goal: our goal is to classify the test data point in one of training data point category.
...ANSWER
Answered 2021-Feb-07 at 03:34I am a physicist and programmer who has worked extensively on Qiskit. I have limited experience with things like machine learning but if I am not mistaken figure 13 on page 22 of this paper on Nearest-Neighbor methods is precisely the circuit you are creating.
You have a dramatic performance hit because you are simulating quantum hardware using classical algorithms. This is commented out:
QUESTION
I'm trying to make some simple pool game in java script. I have made it but I do not love way of checking if two balls will collide in next frame. I would like to have more easier way to calculate coordinates of balls when collision occurs. I found lot of answers base on collision kinematics, how to handle velocities and directions after collision, but no calculating a position when collision occurs.
As you can see in sample diagram, gold ball is moving slower than a blue ball, and with distance that each ball will have to move on next frame will not be considered as collision. But, as you can see, they should collide (dashed lines).
In that cause I have divided each movement into sectors and calculating if distance between the points is equal or smaller than ball diameter, which is slowing down process when many balls (like in snooker) have to be calculated in each frame, plus that way is not always 100% accurate and balls can go in inaccurate angles after hit (not a big difference, but important in snooker).
Is there any easier way to calculate those (XAC,YAC) and (XBC,YBC) values with knowing start positions and velocities of each ball without dividing ball paths into sectors and calculating many times to find a proper distance?
...ANSWER
Answered 2021-Jan-13 at 06:38It is worth to precalculate collision event only once (this approach works well with reliable number of balls, because we have to treat all ~n^2
pairs of balls).
The first ball position is A0
, velocity vector is VA
.
The second ball position is B0
, velocity vector is VB
.
To simplify calculations, we can use Halileo principle - use moving coordinate system connected with the first ball. In that system position and velocity of the first ball are always zero. The second ball position against time is :
QUESTION
Hi I want to create a new array from existing array.
...ANSWER
Answered 2020-Aug-17 at 13:37var finalValue = [];
for (var i = 0; i < this.someArray.length; i++) {
finalValue = [ ...finalValue, ...this.someArray[i].farcKeyValues ]
}
QUESTION
i just wanna know if there is a way to url encode an dynamic email variable in postman? basically i want random names in all parts of the email for my collection run. For example test1@abc.com , ybc@asd.com.(which can be solved by using the email variable provided by postman) However, i also need to url encode that email so it will look something like this
test1%40abc.com
please let me know if this can be achieved with JS code snippet or any other easier method, Thanks in advance. :)
...ANSWER
Answered 2020-Aug-11 at 16:30Add this line to your request's preRequest script:
pm.environment.set("randomEncodedEmail", encodeURIComponent(pm.variables.replaceIn('{{$randomEmail}}')));
to generate an encoded random email address.
Then you can just use {{randomEncodedEmail}} in your request to use it.
QUESTION
I'm using https://code.tutsplus.com/tutorials/creating-digital-signatures-with-swift--cms-29287 to create digital signatures and I'm following along with the ECDSA section.
I've created the following code:
...ANSWER
Answered 2019-Nov-04 at 20:49The error status -4 has several meanings, not only errSecUnimplemented
, but also errSecUnsupportedAlgorithm
and errSecUnsupportedOperation
, however, in this scenario, is is very likely it is the errSecUnimplemented
.
The reason for this is that you try to retrieve the private key from the Secure Enclave, which is 'impossible'. Part of the security of the Secure Enclave is that it will not have the ability of exposing the private key to you. So there you go, that is why it is throwing a errSecUnimplemented
error at you.
So if you want to use the Secure Enclave, I would suggest you look some more in the security documentation that Apple provides.
A solution I can present you is the following:
QUESTION
For ease I have simplified and generalized the code for the question.
So my problem (R one that is) is that I am trying to cycle through a set of Kolmogorov Smirnov ks.boot tests for multiple levels across two factors. I need to subset the data for each level of the vector df.test$names (e.g. W, X, Y, and Z representing species names) then cycle through comparing the length distributions between each level of df.test$TSM.FACT (e.g. A,B,C and so on representing time periods).
So for each level in df.test$names (e.g. W, X,Y,Z)I will need to compare their lengths distributions from different time periods A versus B; then A versus C, then B versus C and save out each result in a dataframe; recording where the comparison took place.
...ANSWER
Answered 2019-Oct-23 at 05:24Preparing all patterns of names, TSM.FACT1, TSM.FACT2, you can do all test easily by loop like methods.
Here is my example:
QUESTION
I'm trying to open a map via Fragment and for some reason the app collapse instantly I have also checked whether the API is correct and it seems to be ok. I have checked online for solutions with no success. in the MainActivity class i add only the line which makes the MapFragment object thanks for the help
Manifest.xml
...ANSWER
Answered 2019-Jan-06 at 21:08Your "mGoogleMap" variable is null , follow this code to fix it :
QUESTION
I have a SQL Server 2008 Job that backs up a database, then zips that backup and moves the zipped file. My job runs fine until it gets to the step that calls WinZip, which executes:
...ANSWER
Answered 2018-Apr-12 at 21:53I think I discovered the problem. It turns out, we are using the GUI version of WinZip and calling the executable from the command line. Even though we can't see the GUI, it's still there. So, the prompt to confirm our compression is still there in the program's workflow, we just can't see it and thus can't confirm it. And the confirm flags don't work with the GUI version.
My workaround involved logging in to my SQL server as our service account and running a WinZip operation. When it completed and gave me the Add Complete
prompt, I checked Do not display this dialog in the future
and clicked OK
. This will suppress that prompt when the service account runs its Job.
If someone changes the service account, we'll have to do this again, so our ultimate solution will be to install the WinZip Commmand Line Plugin. Hopefully, when that's done, we won't have to worry about this.
But it works now. :-)
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