Goroutines - Go Lang Practical Programming Tutorial p.18

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Welcome everyone to part 18 of the Go Language programming tutorial series, where we'll be talking about concurrency in Go. First, let's acknowledge what concurrency is, and what it isn't. Concurrency is dealing with multiple things at once, and it is not actually doing multiple things simultaneously (parallelism).

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This guy is actually amazing! I've never thought of the situation when the main thread end before others. Many many thanks !

tiennguyenhoang

From FAQ on Go:
Why doesn't my multi-goroutine program use multiple CPUs?
The number of CPUs available simultaneously to executing goroutines is controlled by the GOMAXPROCS shell environment variable. In earlier releases of Go, the default value was 1, but as of Go 1.5 the default value is the number of cores available. Therefore programs compiled after 1.5 should demonstrate parallel execution of multiple goroutines. To change the behavior, set the environment variable or use the similarly-named function of the runtime package to configure the run-time support to utilize a different number of threads.

Programs that perform parallel computation might benefit from a further increase in GOMAXPROCS. However, be aware that concurrency is not parallelism.

MrZKaiser

Such a cliffhanger! I don't even need go for anything, still mad..

maxim

my boy hammbers that spacebar so hard haha.

ChristopherFranko

add
fmt.Scanln()
at the end of the main func to have the logs

mrt

for the case: go say("Hey"); say("There"), the output is "There, Hey, There, Hey, There, Hey". Why do we see the last "Hey"? Should'nt the program end after the last "There"?

serdarbaykan

it would be interesting if we use Django or Flask to build an resp API and use Go to call and do something with it

shanghaifoodie

if a method changed to go routine, will that thread become even parallel to main() method too. As per the main() block, everything should first run inside the main() first ? Please elaborate.

dp

Almost left the video when I saw the Python logo

manofqwerty

Also I was checking a way we could dump out methods from a type, but I've stuck with a scenario where I have one method associated with a struct and unable to dump it out. Could you help..

sammy