performance

问题 I have a matrix M with dimensions (m, n) and I need to append new columns to it from a matrix L with dimensions (m, l) . So basically I will end up with a matrix (m, n + l) . No problem in doing this, I can use: numpy.concatenate numpy.vstack numpy.append in the following fashion np.command(M, L) and it will return me a new matrix. The problem arises with the fact that I need to append many many matrices to the original matrix, and the size of these matrices L are not known beforehand. So I

问题 We have a Windows Server 2012, Apache, PHP, and MySQL. The server is a bit a mess. One of the things that I want is to track the changes on the code. Normally I don't set up Git on the server, instead I develop on the local machine then using SSH I deploy changes to the production server. However this Windows Server 2012 was not set up by me and thus it is a bit mess. I cannot copy the PHP code and develop it in my machine because it runs on PHP 5.2 and the code is encrypted. Thus, I think I

问题 I'm creating a website which some of it's pages contain at least one media player and because of the page size limitations, I want to load the media player javascript file only in pages that have medias. I store media information in an javascript object in head of the page and other script files are being loaded at the end of body. I found this solution (using $.getScript ) very nice but I want a solution that doesn't rely on any frameworks. I saw an interesting implementation in jQuery

问题 I'm creating a website which some of it's pages contain at least one media player and because of the page size limitations, I want to load the media player javascript file only in pages that have medias. I store media information in an javascript object in head of the page and other script files are being loaded at the end of body. I found this solution (using $.getScript ) very nice but I want a solution that doesn't rely on any frameworks. I saw an interesting implementation in jQuery

问题 I have a large binary file that I want to read in an array. The format of the binary files is: there is an extra data of 4 bytes at the start and end of each row that I'm not using; in between I have 8 bytes values I'm doing it like this: # nlines - number of row in the binary file # ncols - number of values to read from a row fidbin=open('toto.mda' ,'rb'); #open this file temp = fidbin.read(4) #skip the first 4 bytes nvalues = nlines * ncols # Total number of values array=np.zeros(nvalues

问题 We can display the actual thread by: ${__threadNum} Is there something similar for the actual loop count? 回答1: You can use ${__jm__Thread Group__idx} to get current loop iteration ${__jm__Thread Group__idx} Notice this is part of a general enhancement in JMeter 5 for exposing the loop count While Controller now exports a variable containing its current index named __jm__<Name of your element>__idx . So for example, if your While Controller is named WC , then you can access the looping index

问题 I am using the following code to remove hidden/filtered lines after applying autofilters to a big sheet in VBA (big means roughly 30,000 rows): Sub RemoveHiddenRows() Dim oRow As Range, rng As Range Dim myRows As Range With Sheets("Sheet3") Set myRows = Intersect(.Range("A:A").EntireRow, .UsedRange) If myRows Is Nothing Then Exit Sub End With For Each oRow In myRows.Columns(1).Cells If oRow.EntireRow.Hidden Then If rng Is Nothing Then Set rng = oRow Else Set rng = Union(rng, oRow) End If End

问题 I created a function that whenever I run the AppendRow script every row that does not have a dot (".") at the AY column, an array with every information/column that I want from that sheet will be transfered to my main sheet that has around 13k rows atm. Usually about 20-40 rows get pasted into the first sheet everyday and this script automatically re-arranges the columns to my main sheet. PROBLEM: The problem is that each row that gets appended to my main sheet takes around 8-15sec to get

问题 I created a function that whenever I run the AppendRow script every row that does not have a dot (".") at the AY column, an array with every information/column that I want from that sheet will be transfered to my main sheet that has around 13k rows atm. Usually about 20-40 rows get pasted into the first sheet everyday and this script automatically re-arranges the columns to my main sheet. PROBLEM: The problem is that each row that gets appended to my main sheet takes around 8-15sec to get

问题 I created a function that whenever I run the AppendRow script every row that does not have a dot (".") at the AY column, an array with every information/column that I want from that sheet will be transfered to my main sheet that has around 13k rows atm. Usually about 20-40 rows get pasted into the first sheet everyday and this script automatically re-arranges the columns to my main sheet. PROBLEM: The problem is that each row that gets appended to my main sheet takes around 8-15sec to get