prealloc | Go static analysis tool to find slice declarations | Code Analyzer library

The program im trying to get working is a generator for images of 1D cellular automate and it needs to be robust enough to handle extremely large simulations on orders of several millions of individual cells so multi-threading the image generation process is necessary. I chose Go for this reason because go-routines were going to make the issue of dividing work for the CPU much easier and efficient. Now because writing each cell with a individual go-routine would not be very performant at all i decided to create a function that calls the image object and is responsible for generating an entire row of cells instead. This function is referencing a 2D array object containing a bitsliced (see this) array of all the cells to be drawn hence the many loops however this is not important to the issue at hand. What the program is supposed to do is simply read all the individual bits and write a square to the image rectangle in the correct position denoting the presence of a cell (based on the variable pSize noting the side length of the square). Here is that function...

i have written a fairly large class for the calculation of measurement uncertainties, but it is painfully slow. Profiling the code shows that the slowest operation, by far, is to insert the computation results into a large sparse matrix. About 97% of all time is spent on that operation. The matrix keeps the uncertainties of all measurement data, and I cannot change the data structures without breaking a lot of other code. So my only option is to optimize the data insertion step. This is done about 5700 times in my benchmark, and every time the amout of data increases.

First solution, extremely slow:

I'm trying to test vhost-user/virtio-net. I used testpmd to send pkts (in txonly mode) to qemu VM. But all pkts were droped showed by testpmd. here is my environment:

I want to get a Uint8Array representation of the string. Is it better to preallocate it once and reuse or to create a new one per the encoding?

I have a C++ class A that can be constructed to perform a certain computation using a function A::compute . This function requires to write to a preallocated memory area (working area) that was allocated at construction of A to perform this computation efficiently. I would like to A::compute to be const in relation to the class, because the computation does not alter the logical state of the object.

Is this a case when the keyword mutable should be used?

Example code:

I have used this document for creating kafka https://kow3ns.github.io/kubernetes-kafka/manifests/

able to create zookeeper, facing issue with the creation of kafka.getting error to connect with the zookeeper.

this is the manifest i have used for creating for kafka:

https://kow3ns.github.io/kubernetes-kafka/manifests/kafka.yaml for Zookeeper

https://github.com/kow3ns/kubernetes-zookeeper/blob/master/manifests/zookeeper.yaml

The logs of the kafka

I am simply trying to store lubridate timestamps in a dataframe. However, they get converted in number of seconds.

Here's a reproducible example:

I have a C#, .NET data server based on the example provided from Microsoft:

https://docs.microsoft.com/en-us/dotnet/api/system.net.sockets.socketasynceventargs?view=net-5.0

I have had this data server working for many years with a simple device listener for processing sent data. The previous use-case was the device sent data to the server and the server sent back a response and the device closed the connection. This works fine.

I am adding the ability to have the device send additional data after receiving the response. This feature works fine the first time. But after the first time, I get subsequent messages that have zero bytes transferred with SocketError still set to Success, but Available shows the proper amount of data that was sent by the client device. So, the data server treats this as a closed connection. I can't figure out why no data gets received by the server even though WireShark shows the data transferred and the number of available bytes on the socket shows that they are waiting to be received. It's like the server gets into a bad state where it just can't actually receive the bytes that are waiting.

Here is the code for the data server:

I am trying to append rows of subplots to a Matplotlib figure inside a loop.

This works: