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kandi X-RAY | hyperlog Summary
kandi X-RAY | hyperlog Summary
Hyperlog is a platform for software developers to showcase their skills and projects in just a few clicks. We are building a complete set of tools for developers to showcase the best of their skills with zero additional coding required, while at the same time making it hackable right down to the level of HTML and CSS.
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QUESTION
My application pops up the ANR (Application is not responding) dialog. For a long time I am trying to solve this issue. I have made lots of optimisations and finally my main thread takes 2~3 million microseconds however that is not enough too.
Also nearly all service calls are done with Rxjava. I do not know if the callbacks are belong to them.
When I use Android Profiler for my specific activity that shows the popup, there are 2 processes that take too long.
Second one is handleCallback. I could not be able to reduce the time of those process. I do not know how to do about it and what it is.
I tried to use async tasks but still have the same problem even though I have achieved some results.
You may see the traces.txt file via this link => gofile.io/?c=BKXCJ2UPDATE:
I killed the app when it popped up the ANR dialog and these are the last log lines:
...ANSWER
Answered 2019-Dec-27 at 15:56Finally I have found the problem which was nothing to do about the codes that I shared.
In the project a service is started but did not set the notification like startForeground(ID, notification)
. It was not showing in the logs. When I choose the Information level logs I saw the cause which was
E/ActivityManager: ANR in PID: 6516 Reason: Context.startForegroundService() did not then call Service.startForeground()
It was an unnecessary service call so I commented that and the ANR dialog is disappeared.
QUESTION
We have a specific need wherein I will have to drop
columns from a dataframe
which has only one unique value in that column. The following is what we are doing
ANSWER
Answered 2017-Jun-06 at 10:51You try the following command:
QUESTION
Hyperlog log is a probablistic algorithm According to the redis HLL document , we could get 0.81% of error but I get errors like 17-20%
I think there is something wrong .. This is my simple perl test script. Is there some error
...ANSWER
Answered 2017-Mar-21 at 12:05HyperLogLog
is used for counting unique items. It can count a large number of items with a little memory. However, the returned cardinality is NOT exact, but approximated with a standard error
.
0.81% is the standard error
, NOT the false positive. For your instance, you can call PFCOUNT HLL
to get the approximated number of unique items you put into the HyperLogLog
. The returned number should be in range of [10000 * (1 - 0.81%), 10000 * (1 + 0.81%)]
.
PFADD
returns 1 if the estimated cardinality is changed after executing the command. It returns 0, otherwise. It has nothing to do with false positive
.
It seems what you need is a Bloom Filter, which can tell you if an item already exists in a data set, with false positive. You can implement a Bloom Filter
with Redis, of course. And there should be some open source project for that.
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