Great sets of notes taken by Blake for Peter Thiel’s class.
Generally speaking, Peter Thiel provides great insights ranging from technical details of how VC works to thought processes to ideas about life. Some of his classes almost seem philosophical in nature. I though that his background (BA Philosophy) might explain that.
Demo:
$ cat file1.txt
123a
123b
$ cat file2.txt
456a
456b
$ paste file1.txt file2.txt > out.txt
$ cat out.txt
123a 456a
123b 456b
Discovered the trap command while looking for a nice way to handle SIGINTs in sh. Example:
Talks about the insights that went into the development of the C language, and its evolution.
I was looking at cowtowncoder’s low-gc-membuffers, which led me to look at an introduction to Byte Buffers and the corresponding javadoc.
In short, ByteBuffer is part of the Java NIO and basically allows you to play with memory outside the garbage-collected Java heap.
An interesting/unintended take away from the intro-to-byte-buffers article is the interlude on virtual memory. Gregory explains the concept of commit charge and resident set size (RSS). The commit charge is the amt of in-memory data that is modifiable. This is limited by RAM+swap and the amt of in-memory data used by other programs. RSS refers to the program’s memory/virtual-pages that are in the RAM. Hence, full GCs can be slow because of the need to touch every live object, and hence every page in the heap and generating page faults for pages not in the RAM.
