Here’s what i found out and the Python program I generated. I tested this with a .dmp file made on linux & analyzed on windows xp. It worked FINE. The Python file is named, “analyze_dmp.py”. #!/usr/local/bin/python2.7 # -*- coding: UTF-8 -*- “””analyze_dmp.py takes the file INFILEPATH [a pstats dump file] Producing OUTFILEPATH [a human readable … Read more
Using the command given below is worked for me. Let you try it in the terminal. flutter pub add –dev flutter_lints (restart VSCode if the warning is still shown)
To analyze a query you already have entered into the Query editor, you need to choose “Include Actual Execution Plan” (7th toggle button to the right of the “! Execute” button). After executing the query, you need to click on the “Execution Plan” tab in the results pane at the bottom (above the results of … Read more
Okay if you’ve created the core dump with gcore or gdb then you’ll need to convert it to something called a HPROF file. These can be used by VisualVM, Netbeans or Eclipse’s Memory Analyzer Tool (formerly SAP Memory Analyzer). I’d recommend Eclipse MAT. To convert the file use the commandline tool jmap. # jmap -dump:format=b,file=dump.hprof … Read more
Regexbuddy’s debugger shows how many steps engine would take to conclude match or not on a given sample. More information on catastrophic backtracking and debugging regular expressions. PS: It is not free but they offer a 3-month money-back guarantee.
In versions of ElasticSearch prior to 5, you can accomplish this by changing the ElasticSearch.yml configuration file. At the very bottom of this file, you can adjust the logging time to record all: index.search.slowlog.threshold.query.warn: 10s index.search.slowlog.threshold.query.info: 5s index.search.slowlog.threshold.query.debug: 2s index.search.slowlog.threshold.query.trace: 500ms index.search.slowlog.threshold.fetch.warn: 1s index.search.slowlog.threshold.fetch.info: 800ms index.search.slowlog.threshold.fetch.debug: 500ms index.search.slowlog.threshold.fetch.trace: 200ms index.indexing.slowlog.threshold.index.warn: 10s index.indexing.slowlog.threshold.index.info: 5s index.indexing.slowlog.threshold.index.debug: 2s … Read more
Average case analysis makes assumptions about the input that may not be met in certain cases. Therefore, if your input is not random, in the worst case the actual performace of an algorithm may be much slower than the average case. Amortized analysis makes no such assumptions, but it considers the total performance of a … Read more
It’s worth being aware that this is a very tricky problem and if you don’t have a background in signal processing (or an interest in learning about it) then you have a very frustrating time ahead of you. If you’re expecting to throw a couple of FFTs at the problem then you won’t get very … Read more
There’s a distinction between “are these constants meaningful or relevant?” and “does big-O notation care about them?” The answer to that second question is “no,” while the answer to that first question is “absolutely!” Big-O notation doesn’t care about constants because big-O notation only describes the long-term growth rate of functions, rather than their absolute … Read more
Amortized analysis doesn’t naively multiply the number of invocations with the worst case for one invocation. For example, for a dynamic array that doubles in size when needed, normal asymptotic analysis would only conclude that adding an item to it costs O(n), because it might need to grow and copy all elements to the new … Read more