(C-x means ctrl+x, M-x means alt+x)
The default prefix is C-b. If you (or your muscle memory) prefer C-a, you need to add this to ~/.tmux.conf
:
// XXX should be standard (and named clone, after Java?) | |
Object.prototype.copy = function () { | |
let o = {} | |
for (let i in this) | |
o[i] = this[i] | |
return o | |
} | |
// Containment testing for arrays and strings that should be coherent with their iterator. | |
Array.prototype.contains = String.prototype.contains = function (e) { |
L1 cache reference ......................... 0.5 ns
Branch mispredict ............................ 5 ns
L2 cache reference ........................... 7 ns
Mutex lock/unlock ........................... 25 ns
Main memory reference ...................... 100 ns
Compress 1K bytes with Zippy ............. 3,000 ns = 3 µs
Send 2K bytes over 1 Gbps network ....... 20,000 ns = 20 µs
SSD random read ........................ 150,000 ns = 150 µs
Read 1 MB sequentially from memory ..... 250,000 ns = 250 µs
#参考:https://github.com/vipshop/vjtools/blob/master/vjstar/src/main/script/jvm-options/jvm-options.sh | |
# http://calvin1978.blogcn.com/articles/jvmoption-7.html | |
# Base settings and GC logging | |
-server | |
-XX:+AlwaysPreTouch # First should be default, but we make it explicit, second pre-zeroes memory mapped pages on JVM startup -- improves runtime performance | |
# -Xloggc:gc-%t.log # CUSTOMIZE LOCATION HERE - $path/gc-%t.log -- the %t in the gc log file path is so we get a new file with each JVM restart | |
-XX:NumberOfGCLogFiles=5 -XX:+UseGCLogFileRotation -XX:GCLogFileSize=20m # Limits the number of files, logs to folder | |
-XX:+PrintGC -XX:+PrintGCDateStamps -XX:+PrintGCDetails -XX:+PrintHeapAtGC -XX:+PrintGCCause |
Picking the right architecture = Picking the right battles + Managing trade-offs