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Quickly reading very large tables as dataframes
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This answer is old, and R has moved on. Tweaking read.table to run a bit faster has precious little benefit. Your options are:
Using vroom from the tidyverse package vroom for importing data from csv/tab-delimited files directly into an R tibble. See Hector's answer.
Using fread in data.table f...
Biggest GWT Pitfalls? [closed]
...all?
As for performance, I've always found that once compiled GWT code is fast, and AJAX calls are nearly always smaller than doing a whole page refresh, but that's not really unique to GWT, though the native RPC packets that you get if you use a JAVA back end are pretty compact.
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Why does Twitter Bootstrap Use Pixels for Font Size?
...ng to scroll left and right in order to read text and that gets old really fast. It's very easy to lose your place when you have to do that."
– tony
Jun 5 '14 at 8:36
4
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Android: Difference between Parcelable and Serializable?
...etSerializableExtra("UniqueKey");
Parcelable
Parcelable process is much faster than Serializable. One of the reasons for this is that we are being explicit about the serialization process instead of using reflection to infer it. It also stands to reason that the code has been heavily optimized fo...
Why should hash functions use a prime number modulus?
...k) and performed well with low collisions on the English dictionary. It is fast (uses Horner's method). Apparently even K&R don't remember where it came from. Similar function is Rabin fingerprint from Rabin-Karp algorithm (1981) but K&R (1978) predates that.
– bain
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Generate a random point within a circle (uniformly)
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Here is a fast and simple solution.
Pick two random numbers in the range (0, 1), namely a and b. If b < a, swap them. Your point is (b*R*cos(2*pi*a/b), b*R*sin(2*pi*a/b)).
You can think about this solution as follows. If you to...
Is there a naming convention for MySQL?
...ase sensitivity problem).
Short names. Simple and clear. The most easy and fast is identify your table or columns, the better. Trust me, when you make a lot of different queries in a short amount of time is better having all simple to write (and read).
Avoid prefixes. Unless you are using the same d...
When to use RDLC over RDL reports?
...nsides:
SSRS is kind of wonkey compared to other things on getting it up fast. Most people get confused by the security policy and designing reports as an 'add on' to VS. SQL 2005 = VS BIDS 2005 , SQL 2008 = VS BIDS 2008, SQL 2012 = VS BIDS 2010(LOL).
Continuing on 1 the policy for security sett...
Elastic search, multiple indexes vs one index and types for different data sets?
...shards.
Implications for having each data model as index:
Efficient and fast to search within index, as amount of data should be smaller in each shard since it is distributed to different indices.
Searching a combination of data models from 2 or more indices is going to generate overhead, because...
How can you program if you're blind?
...y on synthetic speech but do have a Braille display. I find I usually work faster with speech but use the Braille display in situations where punctuation matters and gets complicated. Examples of this are if statements with lots of nested parenthesis’s and JCL where punctuation is incredibly impor...