As soon as the synchronous function execution stops, the GoRoutine execution stops as well regardless of the completion of the function – I have mentioned in on a later stage.<\/li>\n<\/ul>\n First of all, let’s create a function that will calculate the time execution for the code programmed in it.<\/p>\n
\r\npackage main\r\n import (\r\n \t\"fmt\"\r\n \t\"time\"\r\n)\r\n \r\nfunc simple(funcToExec func()) {\r\n \tstart := time.Now()\r\n \tfuncToExec()\r\n \telapsed := time.Since(start)\r\n \tfmt.Println(\"Time Taken for function to execute: \", elapsed)\r\n}\r\nfunc main() {\r\n}\r\n<\/pre>\nSo traditionally the code would look something like this.<\/p>\n
\r\npackage main\r\nimport (\r\n \t\"fmt\"\r\n \t\"time\"\r\n)\r\nfunc simple(funcToExec func()) {\r\n \tstart := time.Now()\r\n \tfuncToExec()\r\n \telapsed := time.Since(start)\u00c7\r\n \tfmt.Println(\"Time Taken for function to execute: \", elapsed)\r\n}\r\nfunc main() {\r\n \tfmt.Println(\"Traditional Execution\")\r\n \tsimple(PrintHelloWorldTraditionally)\r\n}\r\nfunc PrintWith30SecDelay(text string) {\r\n \ttime.Sleep(30 * time.Second)\r\n \tfmt.Println(text)\r\n}\r\nfunc PrintHelloWorldTraditionally() {\r\n \tPrintWith30SecDelay(\"Hello\")\r\n \tPrintWith30SecDelay(\"World\")\r\n}\r\n<\/pre>\nOutput:<\/strong><\/p>\n\r\nTraditional Execution\r\nHello\r\nWorld\r\nTime Taken for function to execute: 1m0s\r\n<\/pre>\nNow let’s see the difference if we run one of the print as a GoRoutine<\/p>\n
\r\npackage main\r\nimport (\r\n \t\"fmt\"\r\n \t\"time\"\r\n)\r\nfunc simple(funcToExec func()) {\r\n \tstart := time.Now()\r\n \tfuncToExec()\r\n \telapsed := time.Since(start)\r\n \tfmt.Println(\"Time Taken for function to execute: \", elapsed)\r\n}\r\nfunc main() {\r\n \tfmt.Println(\"Traditional Execution\")\r\n \tsimple(PrintHelloWorldTraditionally)\r\n \tfmt.Println(\"Execution with GoRoutines\")\r\n \tsimple(PrintHelloWorldWithGoRoutines)\r\n}\r\nfunc PrintWith30SecDelay(text string) {\r\n \ttime.Sleep(30 * time.Second)\r\n \tfmt.Println(text)\r\n}\r\nfunc PrintHelloWorldTraditionally() {\r\n \tPrintWith30SecDelay(\"Hello\")\r\n \tPrintWith30SecDelay(\"World\")\r\n}\r\nfunc PrintHelloWorldWithGoRoutines() {\r\n \tgo PrintWith30SecDelay(\"Hello\")\r\n \tPrintWith30SecDelay(\"World\")\r\n}\r\n<\/pre>\nOutput:<\/strong><\/p>\n\r\nTraditional Execution\r\nHello\r\nWorld\r\nTime Taken for the function to execute: 1m0s\r\nExecution with GoRoutines\r\nHello\r\nWorld\r\nTime Taken for the function to execute: 30s\r\n<\/pre>\nSo the call of the function that prints “Hello” and of the function that prints “World” happens concurrently. Thus the delay is reduced.<\/p>\n
But if you switch the GoRoutine declaration to be<\/p>\n
\r\nPrintWith30SecDelay(\"Hello\")\r\ngo PrintWith30SecDelay(\"World\")\r\n<\/pre>\ninstead of <\/p>\n
\r\ngo PrintWith30SecDelay(\"Hello\")\r\nPrintWith30SecDelay(\"World\")\r\n<\/pre>\nIt will result in not printing of the word “World”. But why so?<\/p>\n
It is because the execution of `PrintWith30SecDelay(“Hello”)`<\/strong> happens a microsecond earlier to that of `PrintWith30SecDelay(“World”)`<\/strong>. Resulting into completion of `PrintWith30SecDelay(“Hello”)`<\/strong> to be a microsecond earlier.<\/p>\nSo how can we solve this specific problem? The answer is with the help of WaitGroups.<\/p>\n
Let’s look at the code on how we would do it?<\/p>\n
\r\npackage main\r\nimport (\r\n \t\"fmt\"\r\n \t\"sync\"\r\n \t\"time\"\r\n)\r\n \r\nvar wg sync.WaitGroup\r\nfunc simple(funcToExec func()) {\r\n \tstart := time.Now()\r\n \tfuncToExec()\r\n \telapsed := time.Since(start)\r\n \tfmt.Println(\"Time Taken for function to execute: \", elapsed)\r\n}\r\nfunc main() {\r\n \tfmt.Println(\"Traditional Execution\")\r\n \tsimple(PrintHelloWorldTraditionally)\r\n \tfmt.Println(\"Execution with GoRoutines\")\r\n \tsimple(PrintHelloWorldWithGoRoutines)\r\n}\r\nfunc PrintWith30SecDelay(text string, wgAdded bool) {\r\n \tif wgAdded {\r\n \tdefer wg.Done()\r\n \t}\r\n \ttime.Sleep(30 * time.Second)\r\n \tfmt.Println(text)\r\n}\r\nfunc PrintHelloWorldTraditionally() {\r\n \tPrintWith30SecDelay(\"Hello\", false)\r\n \tPrintWith30SecDelay(\"World\", false)\r\n}\r\nfunc PrintHelloWorldWithGoRoutines() {\r\n \twg.Add(1)\r\n \tgo PrintWith30SecDelay(\"Hello\", true)\r\n \twg.Add(1)\r\n \tgo PrintWith30SecDelay(\"World\", true)\r\n \twg.Wait()\r\n}\r\n<\/pre>\nOutput:<\/strong><\/p>\n\r\nTraditional Execution\r\nHello\r\nWorld\r\nTime Taken for the function to execute: 8s\r\nExecution with GoRoutines\r\nHello\r\nWorld\r\nTime Taken for the function to execute: 4s\r\n<\/pre>\nNote: GoRoutines and WaitGroups are to be used carefully, or it is likely for it to end up not working correctly or being stuck in a Deadlock.<\/em><\/p>\nThis is something that we can achieve with channels as well that I am going to cover it in the next blog.<\/p>\n
In case, if you are looking for the Golang experts to build a world-class enterprise app with high speed, high security, and high modularity, then hire golang developer<\/a> from us. Our Golang programmers have in-depth knowledge and extensive experience in converting potential ideas into a viable business solution.<\/p>\nRegarding this blog, do let me know your thoughts in the comments section below. I will soon be back with the next part `GoRoutines, Channels and Concurrency in a Nutshell: Part 2 (Channels)` coming soon.<\/p>\n
Ciao.<\/p>\n
Happy Coding Gophers!<\/p>\n","protected":false},"excerpt":{"rendered":"
Hey Fellow Gophers, After a long time, I have decided to jot something down, and this time I have taken up a bit of an ambitious topic. I am going to cover some of the significant features of Go in a series of four blogs “GoRoutines, Channels and Concurrency“. This is a first blog post, […]<\/p>\n","protected":false},"author":21,"featured_media":12125,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"inline_featured_image":false,"_lmt_disableupdate":"no","_lmt_disable":"","footnotes":""},"categories":[1152,1265],"tags":[],"coauthors":[1585],"class_list":["post-12115","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-golang","category-web-development"],"acf":[],"modified_by":"Chandresh Patel","_links":{"self":[{"href":"https:\/\/www.bacancytechnology.com\/blog\/wp-json\/wp\/v2\/posts\/12115","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.bacancytechnology.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.bacancytechnology.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.bacancytechnology.com\/blog\/wp-json\/wp\/v2\/users\/21"}],"replies":[{"embeddable":true,"href":"https:\/\/www.bacancytechnology.com\/blog\/wp-json\/wp\/v2\/comments?post=12115"}],"version-history":[{"count":0,"href":"https:\/\/www.bacancytechnology.com\/blog\/wp-json\/wp\/v2\/posts\/12115\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.bacancytechnology.com\/blog\/wp-json\/wp\/v2\/media\/12125"}],"wp:attachment":[{"href":"https:\/\/www.bacancytechnology.com\/blog\/wp-json\/wp\/v2\/media?parent=12115"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.bacancytechnology.com\/blog\/wp-json\/wp\/v2\/categories?post=12115"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.bacancytechnology.com\/blog\/wp-json\/wp\/v2\/tags?post=12115"},{"taxonomy":"author","embeddable":true,"href":"https:\/\/www.bacancytechnology.com\/blog\/wp-json\/wp\/v2\/coauthors?post=12115"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
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