execution

问题 I am trying to record the Neo4J algorithm execution. I run an algorithm 10 times, however the first run is always significantly longer than the rest of executions. For example: elapsed time = | 86345.0 | 3417.0 | 3416.0 | 4228.0 | 3369.0 | 3323.0 | 3338.0 | 3370.0 | 3775.0 | 3370.0 //ms Why is this happening? Is Neo4J smart enough to store already visited (read from DB) vertices in memory, thus from the second execution it reads from memory not the database? My datasets are small enough to

问题 I am a data engineer and work with airflow regularly. When redeploying dags with a new start date the best practice is as shown in the here: Don’t change start_date + interval : When a DAG has been run, the scheduler database contains instances of the run of that DAG. If you change the start_date or the interval and redeploy it, the scheduler may get confused because the intervals are different or the start_date is way back. The best way to deal with this is to change the version of the DAG

问题 I have a question about PHP's execution time limit. I need to run a script for many hours sending HTTP requests. These requests have to be apart a certain time, so that's why the whole thing is supposed to take hours. Does someone have experience setting this kind of time limit for PHP using the line below? For example: ini_set('max_execution_time', 28800); // 8 hours Strange question, I know, but let me know if this would work or not. TIA! Update: I was going to try it from the browser. I'm

问题 Hii , We generally see that the program execution begins in the main method for the languages like C , C++ , Java (i am familiar with these). I want to know how the compiler knows the presence of MAIN method in the program . What does the main method signify besides that it is the entry point for program execution ...How does these criteria differ for C , C++ ... Provide any links which you think are helpful ... 回答1: Generally, the code that is executed at the beginning of every C or C++

问题 I am making an online judge. This my school project. I am taking a .c file from the user. I am able to compile the .c file with command prompt. But I don't know how to run this file. I need to run this file, take input from a text file and save output in a text file. The compilation code was: gcc main.c -o HelloWorld 回答1: I need to run this file, take input from a text file and save output in a text file. Assuming you're on Linux, this should work: ./HelloWorld < input.txt > output.txt 回答2:

问题 How can I Measure the Page Execution Time in CakePHP 2.1? In 1.3 it was rendered in the code when in debug mode. 回答1: You could use DebugKit Plugin to find out execution time. Or you can edit index.php in app/ and add: // top of file $starTime = microtime(true); // bottom of file echo '<!-- Exec time: ', microtime(true) - $startTime, ' -->'; That time will be in microseconds so you could convert it to ms if you want, but DebugKit gives you a lot more information. 回答2: Note that the time

问题 I am studying Distributed Systems and when it comes to the RPC part, I have heard about these two semantics (at-most-once and exactly-once). I understand that the at-most-once is used on databases for instances, when we don't want duplicate execution. First question: How is this achieved? How does the server know that it shouldnt execute the request again? It might be a duplicate but it might be a legitimate request as well. The second question is: What is the difference between the two

问题 I set up an simple experiment out of curiosity: I dynamically generated a div with the class box before attaching a click listener to it with JQuery. I then created a duplicate of this, except this time, I added a timeout of zero before the box element is generated. As shown in the JSFiddle, using a timeout of zero results in the failure of the click's intended result event to be triggered. This script results in an alert on click. $(document).ready(function(){ //setTimeout(function(){ $("

问题 I need to determine the VMAs for loadable segments of ELF executables. VMAs can be printed from /proc/pid/maps . The relationship between VMAs shown by maps with loadable segments is also clear to me. Each segment consists of one or more VMAs. what is the method used by kernel to form VMAs from ELF segments: whteher it takes into consideration only permissions/flags or something else is also required? As per my understanding, a segment with flags Read, Execute (code) will go in separate VMA

问题 1) I would like to use the profiling functions in the Python C API to catch the python interpreter when it returns from specific functions. 2) I would like to pause the python interpreter, send execution back to the function that called the interpreter in my C++ program, and finally return execution to the python interpreter, starting it on the line of code after where it stopped. I would like to maintain both globals and locals between the times where execution belongs to python. Part 1 I've