Is bash in windows implemented differently from native bash, specifically for loops
I ran the following command on mac in an ad hoc fashion in mac store:
time for x in 1..5000000; do if ! (($x % 10000)); then echo $x; fi done
to perform a very rudimentary benchmark. What this does is that it creates a list from 1 - 5000000, check if it's divisible by 10000, and print if it does. And time benchmark the time for the process to execute. I've been arriving at around 40 secs for macbook air, 32 for pros, all 8th gen intel processors. A particular pattern I noticed is that it freezes for a long time before printing out anything, presumably this is because it's creating a list from 1 to 5000000 and putting it in memory.
However, my friend who use windows reported faster times on gen 5 core m processor with Windows 10 native bash shell, on the order of 15 seconds. I suspect it's because windows bash treat for x in 1..5000000 as a generator. In this way the process never made into memory as everything would only needed to be stored in cache, achieving greater speed. Can anyone confirm that for loops for bash interpreter is the same/different across windows implementation and linux/mac implementations?
bash generator windows-subsystem-for-linux cpu-cache
asked Nov 10 '18 at 16:17
Rocky LiRocky Li
2,8301316
add a comment |
I ran the following command on mac in an ad hoc fashion in mac store:
time for x in 1..5000000; do if ! (($x % 10000)); then echo $x; fi done
to perform a very rudimentary benchmark. What this does is that it creates a list from 1 - 5000000, check if it's divisible by 10000, and print if it does. And time benchmark the time for the process to execute. I've been arriving at around 40 secs for macbook air, 32 for pros, all 8th gen intel processors. A particular pattern I noticed is that it freezes for a long time before printing out anything, presumably this is because it's creating a list from 1 to 5000000 and putting it in memory.
However, my friend who use windows reported faster times on gen 5 core m processor with Windows 10 native bash shell, on the order of 15 seconds. I suspect it's because windows bash treat for x in 1..5000000 as a generator. In this way the process never made into memory as everything would only needed to be stored in cache, achieving greater speed. Can anyone confirm that for loops for bash interpreter is the same/different across windows implementation and linux/mac implementations?
bash generator windows-subsystem-for-linux cpu-cache
asked Nov 10 '18 at 16:17
Rocky LiRocky Li
2,8301316
Compare the results in same hardware.
– Biswapriyo
Nov 10 '18 at 17:36
@Biswapriyo That's not possible, I don't own any hardware running windows.
– Rocky Li
Nov 10 '18 at 19:37
add a comment |
I ran the following command on mac in an ad hoc fashion in mac store:
time for x in 1..5000000; do if ! (($x % 10000)); then echo $x; fi done
to perform a very rudimentary benchmark. What this does is that it creates a list from 1 - 5000000, check if it's divisible by 10000, and print if it does. And time benchmark the time for the process to execute. I've been arriving at around 40 secs for macbook air, 32 for pros, all 8th gen intel processors. A particular pattern I noticed is that it freezes for a long time before printing out anything, presumably this is because it's creating a list from 1 to 5000000 and putting it in memory.
However, my friend who use windows reported faster times on gen 5 core m processor with Windows 10 native bash shell, on the order of 15 seconds. I suspect it's because windows bash treat for x in 1..5000000 as a generator. In this way the process never made into memory as everything would only needed to be stored in cache, achieving greater speed. Can anyone confirm that for loops for bash interpreter is the same/different across windows implementation and linux/mac implementations?
bash generator windows-subsystem-for-linux cpu-cache
asked Nov 10 '18 at 16:17
Rocky LiRocky Li
2,8301316
I ran the following command on mac in an ad hoc fashion in mac store:
time for x in 1..5000000; do if ! (($x % 10000)); then echo $x; fi done
to perform a very rudimentary benchmark. What this does is that it creates a list from 1 - 5000000, check if it's divisible by 10000, and print if it does. And time benchmark the time for the process to execute. I've been arriving at around 40 secs for macbook air, 32 for pros, all 8th gen intel processors. A particular pattern I noticed is that it freezes for a long time before printing out anything, presumably this is because it's creating a list from 1 to 5000000 and putting it in memory.
However, my friend who use windows reported faster times on gen 5 core m processor with Windows 10 native bash shell, on the order of 15 seconds. I suspect it's because windows bash treat for x in 1..5000000 as a generator. In this way the process never made into memory as everything would only needed to be stored in cache, achieving greater speed. Can anyone confirm that for loops for bash interpreter is the same/different across windows implementation and linux/mac implementations?
bash generator windows-subsystem-for-linux cpu-cache
bash generator windows-subsystem-for-linux cpu-cache
asked Nov 10 '18 at 16:17
Rocky LiRocky Li
2,8301316
asked Nov 10 '18 at 16:17
Rocky LiRocky Li
2,8301316
asked Nov 10 '18 at 16:17
Rocky LiRocky Li
2,8301316
asked Nov 10 '18 at 16:17
Rocky LiRocky Li
2,8301316
asked Nov 10 '18 at 16:17
Rocky LiRocky Li
2,8301316
2,8301316
Compare the results in same hardware.
– Biswapriyo
Nov 10 '18 at 17:36
@Biswapriyo That's not possible, I don't own any hardware running windows.
– Rocky Li
Nov 10 '18 at 19:37
add a comment |
Compare the results in same hardware.
– Biswapriyo
Nov 10 '18 at 17:36
@Biswapriyo That's not possible, I don't own any hardware running windows.
– Rocky Li
Nov 10 '18 at 19:37
Compare the results in same hardware.
– Biswapriyo
Nov 10 '18 at 17:36
Compare the results in same hardware.
– Biswapriyo
Nov 10 '18 at 17:36
@Biswapriyo That's not possible, I don't own any hardware running windows.
– Rocky Li
Nov 10 '18 at 19:37
@Biswapriyo That's not possible, I don't own any hardware running windows.
– Rocky Li
Nov 10 '18 at 19:37
add a comment |
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Compare the results in same hardware.
– Biswapriyo
Nov 10 '18 at 17:36
@Biswapriyo That's not possible, I don't own any hardware running windows.
– Rocky Li
Nov 10 '18 at 19:37