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/** | |
* Coroutine-based solution for delayed and periodic work. May fire once (if [interval] omitted) | |
* or periodically ([startDelay] defaults to [interval] in this case), replacing both | |
* `Observable.timer()` & `Observable.interval()` from RxJava. | |
* | |
* In contrast to RxJava, intervals are calculated since previous run completion; this is more | |
* convenient for potentially long work (prevents overlapping) and does not suffer from queueing | |
* multiple invocations in Doze mode on Android. | |
* | |
* Dispatcher is inherited from scope, may be overridden via [context] parameter. |
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# lldb debugging v8-related functionality in Node.js | |
# ========================================================= | |
# lldb re-write of user-defined V8 debugging functions | |
# https://github.com/v8/v8/blob/master/tools/gdbinit | |
#allow the file to be read when lldb starts (set to false to ignore it) | |
settings set target.load-cwd-lldbinit true | |
# Print HeapObjects. |
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package io.realm; | |
import java.io.IOException; | |
import java.lang.reflect.Field; | |
import java.lang.reflect.Modifier; | |
import java.util.EnumMap; | |
import java.util.Map; | |
public class RealmUtil { |
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Latency Comparison Numbers (~2012) | |
---------------------------------- | |
L1 cache reference 0.5 ns | |
Branch mispredict 5 ns | |
L2 cache reference 7 ns 14x L1 cache | |
Mutex lock/unlock 25 ns | |
Main memory reference 100 ns 20x L2 cache, 200x L1 cache | |
Compress 1K bytes with Zippy 3,000 ns 3 us | |
Send 1K bytes over 1 Gbps network 10,000 ns 10 us | |
Read 4K randomly from SSD* 150,000 ns 150 us ~1GB/sec SSD |