nanotime Questions
6
I wanted to get system time in nano seconds in Perl. I tried Time::HiRes module and it's supporting only until micro seconds.
7
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I know Thread.sleep() can make a java thread suspend for a while, like certain milliseconds and certain nanoseconds. But the problem is the invocation of this function also causes overhead.
For e...
Fibrinolysis asked 16/7, 2012 at 5:35
5
Java 8's java.time.Instant stores in "nanosecond resolution", but using Instant.now() only provides millisecond resolution...
Instant instant = Instant.now();
System.out.println(instant);
System.o...
4
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I'm wondering what the most accurate way of converting a big nanoseconds value is to milliseconds and nanoseconds, with an upper limit on the nanoseconds of 999999. The goal is to combine the nanos...
Gavingavini asked 29/11, 2010 at 3:36
3
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I want to convert the result of System.nanoTime() to a date.
public void tempBan(Player p, Player banner, int timeInSeconds){
Long timeInNano = (long) (timeInSeconds * 10^9);
int newTime = (int)...
3
I'm trying to generate meaningless words without using any Random() functions. I figured out that i can use current clock or mouse coordinate. And i picked to use current clock. Here is the code i ...
Telegraphese asked 9/3, 2019 at 12:45
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As documented in the blog post Beware of System.nanoTime() in Java, on x86 systems, Java's System.nanoTime() returns the time value using a CPU specific counter. Now consider the following case I u...
1
Since the latest Android update (v. 8), I realized a very strange behavior while trying to read sensors. More specifically, I am speaking about WiFi and Cell Towers. Here are two examples:
While I...
Stripy asked 28/12, 2017 at 19:51
4
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The documentation for System.nanoTime() says the following (emphasis mine).
This method can only be used to measure elapsed time and is not related to any other notion of system or wall-clock ti...
1
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I have seen and read posts on why System.nanoTime() is slower on some OSes than others, however I have never seen anything to explain the difference I am seeing now. Using JMH, I am running this be...
6
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I created a filter that monitors the length of a request.
long start = System.nanoTime();
...
long end = System.nanoTime();
How can I get the number of milliseconds from this now?
Arboretum asked 6/9, 2010 at 23:34
7
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The title is pretty much self-explanatory, I'm killing myself over this simplicity.
Looked here, but it isn't much helpful.
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java.sql.Timestamp constructor go like this:
public Timestamp(long time) {
super((time/1000)*1000);
nanos = (int)((time%1000) * 1000000);
if (nanos < 0) {
nanos = 1000000000 + nanos;
supe...
1
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I have a thread which pushes data into a queue and another thread which reads data from queue and processes it. I would like to check how long the data sits in the queue before getting processed.
...
3
I'm encountering a really unusual issue here. It seems that the calling of Thread.sleep(n), where n > 0 would cause the following System.nanoTime() calls to be less predictable.
The code below dem...
Accessible asked 15/11, 2015 at 4:18
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So my question is more general. I've the following simple code:
for(int i=0;i<10;i++){
long starttime=System.nanoTime();
System.out.println("test");
long runtime=System.nanoTime()-starttime;...
3
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my application performs in background step counting using the step detector sensor API's introduced in android 4.4.X.
It's essential to my app to know the exact time (at least accuracy of a second...
Degrade asked 4/11, 2014 at 7:0
3
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Is this even possible in PHP?
If not, what is the highest precision available?
2
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According to its documentation, System.nanoTime returns
nanoseconds since some fixed but arbitrary origin time. However, on all x64 machines I tried the code below, there were time jumps, moving t...
Imbalance asked 1/1, 2014 at 23:10
2
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This is the snippet:
String myTime = someTime / 1e9d + ",";
someTime is derived by using System.nanoTime(). What does 1e9d do here?
Flam asked 12/12, 2013 at 16:3
2
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I have a BFS algorithm to solve the 8-Puzzle, and one of the project requirements is to output the amount of time it takes to find the shallowest solution.
I am using System.nanoTime() to keep tra...
3
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I have a timestamp in epoch time with nanoseconds - e.g. 1360287003083988472 nanoseconds since 1970-01-01.
The Python datetime objects and conversion methods only support up to millisecond precisio...
2
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class testx
{
public testx()
{
long startTime = System.nanoTime();
System.out.println((System.nanoTime() - startTime));
}
public static void main(String args[])
{
new testx();
new testx()...
Donniedonnish asked 17/8, 2012 at 19:56
1
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I'm trying to use following code with System.nanoTime() to measure the elapsed time of code.
public static void main(String[] args) throws Exception {
while (true) {
long start = System.nanoTime...
3
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I'm in an android widget and checking elapsed time between two calls of System.nanoTime() and the number is huge. How do you measure elapsed time with this? It should be a fraction of a second and ...
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