thrash | Golang HTTP Micro Benchmarker | HTTP library
kandi X-RAY | thrash Summary
kandi X-RAY | thrash Summary
Golang HTTP Micro Benchmarker.
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Top functions reviewed by kandi - BETA
- fetch fetches and fetches all pending requests .
- configure is the main entry point for testing
- addResponse adds the given response to the summary .
- fetchURL sends an HTTP request to the server .
- startProfiler starts the profiler .
- printUsage prints the usage of flags .
thrash Key Features
thrash Examples and Code Snippets
Community Discussions
Trending Discussions on thrash
QUESTION
I want to crop the mobile from below image:
For doing that, I am trying to detect a rectangle shape in the image, and then cropping the image using following code:
...ANSWER
Answered 2021-Apr-13 at 08:13There's no need to do the approximation on the contours. For that specific image, you'll get one large contour, which you can simply get the bounding rectangle from, and crop the desired part. I optionally added setting the background transparent.
QUESTION
Again, on AWS with PySpark, can't seem to get it right, somehow. My first dataframe which is the result of a prior data transformation, looks like this as DF1:
...ANSWER
Answered 2021-Mar-27 at 17:42Just as what you said, you can join on id, then group by id and sum up amount:
QUESTION
I'm running a site locally and deployed with an 80 page modal in the React framework. I use state to move through the pages in the modal using the [currentStep, setCurrentStep] hooks. setCurrentStep can be invoked three ways- through back and next click button, through an input box by entering a page number and then hitting enter, and through the left and right keyboard keys. It's only the left and right keys that give me a problem. After several times clicking them (with pauses in between) the page becomes unresopnsive.
I thought maybe it had something to do with listeners, blocking or too many unfinished calls, and I thought I could maybe find answers with features of dev tools like memory and event listener but these didn't help me. I noted that the input box option also used a similar event listener so I thought there could be an interaction somehow, so I changed it to a keyup listener and still go the same effects.
Then I noticed as I clicked an arrow, the DOM started thrashing: mounting and unmounting a few sibling elements back and forth through two or three pages worth, which I can pick out despite the speed. Doing this in from the beginning I noticed the first time, it was normal. The second time it thrashed just a few times, and then it got higher and higher, almost like it was an n! function.
What's interesting is that the other two methods (button and input) call the exact same setCurrentStep and nothing else. There must be some side effect happening or some difference somewhere, that makes think there needs to be a mount and unmount, despite them going through the same narrow pathways. I must be missing something. I am pretty sure it's not a data type issue. The next and back functions handle the incrementing and decrementing.
...ANSWER
Answered 2021-Feb-27 at 05:01You should add event listeners only once and remove listener after modals gone.
For that, We can add listeners after React components mounted by using a useEffect hook. If you add listeners outside of useEffect hook, It will eventually add anonymous event listeners every render.
QUESTION
I'm trying to get the url of the final destination of a specific website, but all the templates I've found to use as a function in my spreadsheet, only return the initial link:
...ANSWER
Answered 2021-Feb-19 at 05:39When I saw the HTML of the URL https://c.newsnow.co.uk/A/1067471289?-833:12, I thought that in this case, the value of https://sports.ndtv.com/football/europa-league-bruno-fernandes-double-helps-manchester-united-thrash-real-sociedad-gareth-bale-stars-for-tottenham-2373767 might be able to be directly retrieved using IMPORTXML and a xpath. The sample formula is as follows.
QUESTION
Attempt
After reading a large json file and capturing only the 'text' column, I would like to add a column to dataframe and set all rows to a specific value:
ANSWER
Answered 2021-Feb-19 at 04:23The problem is that your read_json(....).text line returns a series, not a dataframe.
Adding a .to_frame() and referencing the column in the following line should fix it:
QUESTION
I use webpack as a bundler AND task runner.
I don't want it to rebuild bundles if sources haven't changed:
- when run in watch mode, it caches to memory, and won't rebuild unless necessary
- BUT as a pure task runner (no watch mode), it rebuilds on every run
How do I prevent it from rebuilding every time? It takes longer, and thrashes my SSD drive.
...ANSWER
Answered 2021-Feb-10 at 13:16I found the answer:
QUESTION
I have an array of structs, where each struct is a 2D position (pair of 32-bit values). This array is for tracking points of interest on a map.
...ANSWER
Answered 2021-Jan-28 at 14:36Apart from trivial cases, it's often extremely hard to predict where the performance gains are. That's why you should benchmark your code before and after changes. Also profile your code to find where it spends most time.
In other languages, this is where I break out a dictionary or hash set. Neither exist in C, so I have to weigh the complexity of adding something like that.
TBH, it's not that complicated to implement. If you need the performance, it's a no brainer. But it's not guaranteed that it will be faster.
I've considered sorting the list (i.e. first by X, then Y). But given the frequency of updates, I feel like I'll be thrashing the table far more than when iterating. But my knowledge of sorting algorithms is minimal.
It's very likely that this is not optimal. But you can try it out. And you don't need to do a complete sort. Just do a binary search and move everything that comes after.
Would a binary tree of some sort be any better here? Or would I again be spending all of my time re-balancing the tree?
Only one way to find out. Try it and benchmark.
Theoretically, given the (perceived) complexity of these algorithms, is there a threshold below which a linear search remains a viable option?
I'm sure there are, but these always have to be balanced with reality. Like cache misses that can have a great impact on performance. One thing that might improve cache-friendlyness could be changing
QUESTION
in intel's manual, the following section confuse me:
11.5.6.2 Shared Mode In shared mode, the L1 data cache is competitively shared between logical processors. This is true even if the logical processors use identical CR3 registers and paging modes. In shared mode, linear addresses in the L1 data cache can be aliased, meaning that one linear address in the cache can point to different physical locations. The mechanism for resolving aliasing can lead to thrashing. For this reason, IA32_MISC_ENABLE[bit 24] = 0 is the preferred configuration for processors based on the Intel NetBurst microarchitecture that support Intel Hyper-Threading Technology.
as intel use VIPT(equals to PIPT) to access cache.
how cache aliasing would happened ?
...ANSWER
Answered 2020-Nov-05 at 19:06Based on Intel® 64 and IA-32 Architectures Optimization Reference Manual, November 2009 (248966-020), Section 2.6.1.3:
Most resources in a physical processor are fully shared to improve the dynamic utilization of the resource, including caches and all the execution units. Some shared resources which are linearly addressed, like the DTLB, include a logical processor ID bit to distinguish whether the entry belongs to one logical processor or the other.
The first level cache can operate in two modes depending on a context-ID bit:
- Shared mode: The L1 data cache is fully shared by two logical processors.
- Adaptive mode: In adaptive mode, memory accesses using the page directory is mapped identically across logical processors sharing the L1 data cache.
Aliasing is possible because the processor ID/context-ID bit (which is just a bit indicating which virtual processor the memory access came from) would be different for different threads and shared mode uses that bit. Adaptive mode simply addresses the cache as one would normally expect, only using the memory address.
Specifically how the processor ID is used when indexing the cache in shared mode appears not to be documented. (XORing with several address bits would provide dispersal of indexes such that adjacent indexes for one hardware thread would map to more separated indexes for the other thread. Selecting a different bit order for different threads is less likely since such would tend to increase delay. Dispersal reduces conflict frequency given spatial locality above cache line granularity but less than way-size granularity.)
QUESTION
This is how my sql my.ini file looks like. I wanted to enable inifile but ended messing up the file. Now when i try to open mysql command line it throws 'fatal error in default handling' And also says option without preceding group and it closes instantly. I made a video of what it does. Please help me what to do Make it back normal. my.ini file is attached below
...ANSWER
Answered 2020-Jul-17 at 20:14Consider using filename strings in your configuration file without the surrounding " marks.
For instance, general_log_file="A.log"
could be general_log_file=./general.log
to be descriptive of the log filename in Windows in your current datadir
There are others that do not need surrounding " marks.
QUESTION
I have been thrashing like crazy -- literally days -- trying to highlight certain parts of my table with thicker borders.
I have a 12-row x 3-column table that has a header row and two "label columns" making it a 13-row x 5-column table altogether.
It looks like this:
I would like for all the borders to be 1px but I would like to highlight the 12 3x1 "boxes" by making their borders, say, 3x. I have shown the borders of those "boxes" in red to better illustrate their location, but I would like them to be black borders. I would also like to make the outside border of the table 3px and maybe the horizontal borders that run the full width of the table.
I have been trying to use the :nth-child(3n+m) selector to facilitate this:
...ANSWER
Answered 2020-Jul-08 at 08:34I've created a fiddle here https://jsfiddle.net/a7o6uw0f/
What it does:
- it operates on the td instead of the tr
- it separates table header from body.
- it adapts to the fact that sometimes (rowspan=3) a td might be a first element and otherwise not
Uncomment the border-color parts to see how the colors work on the individual cell borders.
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