search for: rhsqstart

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2009 Mar 30
1
List assignment in a while loop and timing
Hello R users I have question about the time involved in list assignment. Consider the following code snippet(see below). The first line creates a reader object, which is the interface to 1MM key-value pairs (serialized R objects) spanning 50 files (a total of 50MB). rhsqstart initiates the reading and I loop, reading each key-value pair using rhsqnextKVR. If this returns NULL, we switch to the next file and if this returns null we break. If I comment out line A1, it takes 39 seconds on a quad core intel with 16GB ram running R-2.8 If I include the assignment A1 it take...
2009 Apr 01
0
回复: R-help Digest, Vol 73, Issue 32
...ype: text/plain; charset=UTF-8 Hello R users I have question about the time involved in list assignment. Consider the following code snippet(see below). The first line creates a reader object, which is the interface to 1MM key-value pairs (serialized R objects) spanning 50 files (a total of 50MB). rhsqstart initiates the reading and I loop, reading each key-value pair using rhsqnextKVR. If this returns NULL, we switch to the next file and if this returns null we break. If I comment out line A1, it takes 39 seconds on a quad core intel with 16GB ram running R-2.8 If I include the assignment A1 it take...