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?? ??? "Go ??? ?????" ???? 1????.
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package main import ( "fmt" "time" ) func downloadFile(filename string) { fmt.Printf("Starting download: %s\n", filename) // Simulate file download with sleep time.Sleep(2 * time.Second) fmt.Printf("Finished download: %s\n", filename) } func main() { fmt.Println("Starting downloads...") startTime := time.Now() downloadFile("file1.txt") downloadFile("file2.txt") downloadFile("file3.txt") elapsedTime := time.Since(startTime) fmt.Printf("All downloads completed! Time elapsed: %s\n", elapsedTime) }
?? ????? ???? ?? ? 2? ????? ????? ?? ??? ????? ? 6?? ?????. ?? ???? ?????.
? ??? ?? ? ????. go ??? ????? ????? ??? ?????.
????: ?? ?? ?? ???? ?????
package main import ( "fmt" "time" ) func downloadFile(filename string) { fmt.Printf("Starting download: %s\n", filename) // Simulate file download with sleep time.Sleep(2 * time.Second) fmt.Printf("Finished download: %s\n", filename) } func main() { fmt.Println("Starting downloads...") // Launch downloads concurrently go downloadFile("file1.txt") go downloadFile("file2.txt") go downloadFile("file3.txt") fmt.Println("All downloads completed!") }
????? ???? ???? ????? ???
?? ?? ???? ??? ???? ?? ?? ???? ?????.
?? ???? ?? ??? ???? ???? ?? ?? ??? ????? ?? ?????. ? ?? ??? ?? ???? ?? ??? ?? ??? ????? ????.
??: ?? ?? ??? ?????? ;)
? ??? ????? ?? ???? ?? ???? ??? ??? ????? ?? ??? ?????. ?? ???? ???? ?? ??? ????:
- ? ?? ?????(?? ??)
- WaitGroup ??(??? ??, ?? ??)
- ?? ??(? ??? ???? ??????)
go ??? ??? ??? ? ? ?? ?????.
package main import ( "fmt" "time" ) func downloadFile(filename string) { fmt.Printf("Starting download: %s\n", filename) // Simulate file download with sleep time.Sleep(2 * time.Second) fmt.Printf("Finished download: %s\n", filename) } func main() { fmt.Println("Starting downloads...") startTime := time.Now() downloadFile("file1.txt") downloadFile("file2.txt") downloadFile("file3.txt") elapsedTime := time.Since(startTime) fmt.Printf("All downloads completed! Time elapsed: %s\n", elapsedTime) }
? ??? ???? ??? ?? ??? ??? ? ? ??? ????. ??? ?? ??? ????? ?? ??????? ???? ??? ????? ?? ?? ????.
sync.WaitGroup? ?????.
Go? sync.WaitGroup? ??? ??? ??? ??? ??? ???? ? ???? ??? ?? ???????.
??? ??? ?? ???? ?????.
package main import ( "fmt" "time" ) func downloadFile(filename string) { fmt.Printf("Starting download: %s\n", filename) // Simulate file download with sleep time.Sleep(2 * time.Second) fmt.Printf("Finished download: %s\n", filename) } func main() { fmt.Println("Starting downloads...") // Launch downloads concurrently go downloadFile("file1.txt") go downloadFile("file2.txt") go downloadFile("file3.txt") fmt.Println("All downloads completed!") }
?? ????? sync.WaitGroup? ??? ??? ?????.
??? ????:
- WaitGroup? ?? ???? ?????
- wg.Add(n)? ???? n?? ??????.
- wg.Done()? ???? 1? ??????.
- wg.Wait()? ???? 0? ??? ??? ?????.
??? ??:
- ?? ???? ???? ???? ?? Add(3)? ?????
- ? ???? ???? Done()? ?????
- ?? ???? ???? 0? ??? ??? Wait()?? ?????.
- ???? 0? ???? ????? ???? ???? ?????
??? ? ???? ??
package main
import (
"fmt"
"time"
)
func downloadFile(filename string) {
fmt.Printf("Starting download: %s\n", filename)
// Simulate file download with sleep
time.Sleep(2 * time.Second)
fmt.Printf("Finished download: %s\n", filename)
}
func main() {
fmt.Println("Starting downloads...")
startTime := time.Now() // Record start time
go downloadFile("file1.txt")
go downloadFile("file2.txt")
go downloadFile("file3.txt")
// Wait for goroutines to finish
time.Sleep(3 * time.Second)
elapsedTime := time.Since(startTime)
fmt.Printf("All downloads completed! Time elapsed: %s\n", elapsedTime)
}
??
??? ??? ???? ??? ????? ? ??????. ?? ?? ??? ??? ?????? ??? ???? ????.
Go???? ??? ?? ??? ???? ??? ??? ?? ?????. ?? ???? ???? ???? ??? ? ?? ??? ?????.
??? ???? ?????: ? ???? ???? ??? ?? ? ?? ?? ???? ?? ?? ? ????.
? ?? ??? ??? ????.
- ??? ????? ???? ????.
- ?? ???? ???? ??? ??? ??? ??? ?? ch ?????.
- ???? ?? ??? ?? ???? ??? ?? ??? <-ch ?????.
package main import ( "fmt" "time" ) func downloadFile(filename string) { fmt.Printf("Starting download: %s\n", filename) // Simulate file download with sleep time.Sleep(2 * time.Second) fmt.Printf("Finished download: %s\n", filename) } func main() { fmt.Println("Starting downloads...") startTime := time.Now() downloadFile("file1.txt") downloadFile("file2.txt") downloadFile("file3.txt") elapsedTime := time.Since(startTime) fmt.Printf("All downloads completed! Time elapsed: %s\n", elapsedTime) }
ch <- "hello"? ?? ??? ???? ??? ?????? ??? ????? ???? ?? ???? "hello"? ???? ???? ???? ?? ??? ?? ???? ???? ???? ?? ??? ??? ???.
???? ???? ? ??? ??? ?????
package main import ( "fmt" "time" ) func downloadFile(filename string) { fmt.Printf("Starting download: %s\n", filename) // Simulate file download with sleep time.Sleep(2 * time.Second) fmt.Printf("Finished download: %s\n", filename) } func main() { fmt.Println("Starting downloads...") // Launch downloads concurrently go downloadFile("file1.txt") go downloadFile("file2.txt") go downloadFile("file3.txt") fmt.Println("All downloads completed!") }
??? ???? ?????.
?? ???? ?? ????? ????? ??? ???? ???? ??? ??? ?? msg := <-ch? ???? ???? ??? ??? ?? ???? ?????. ???.
??? ???? ??? ?? ??? ???? ?? ?? ??
?? ??? ???? ?? ???? ??? ??? ?????(??? ?? ??? ??? ??? ???? ????).
package main import ( "fmt" "time" ) func downloadFile(filename string) { fmt.Printf("Starting download: %s\n", filename) // Simulate file download with sleep time.Sleep(2 * time.Second) fmt.Printf("Finished download: %s\n", filename) } func main() { fmt.Println("Starting downloads...") startTime := time.Now() // Record start time go downloadFile("file1.txt") go downloadFile("file2.txt") go downloadFile("file3.txt") // Wait for goroutines to finish time.Sleep(3 * time.Second) elapsedTime := time.Since(startTime) fmt.Printf("All downloads completed! Time elapsed: %s\n", elapsedTime) }
???:
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3?? ???? ??? ??
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- ? <-done? ?? ??? ??? ?????
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?? ??:
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- ?? 2: ? ?? ????? ??? ??? ??
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????? ??????!
??:
? ? ??(?? <- true)?? ??? ? ?? ??(<-done)
? ????. ? ?? ???? ??? ?? ?? ?? ?????
? ?? ???? ??? ??? ? ????
??? ?? ? ?? ???? ??? ??? ? ??? ???????. ??? ???. ?? ??? ?????? ?? ?? ???.
package main import ( "fmt" "time" ) func downloadFile(filename string) { fmt.Printf("Starting download: %s\n", filename) // Simulate file download with sleep time.Sleep(2 * time.Second) fmt.Printf("Finished download: %s\n", filename) } func main() { fmt.Println("Starting downloads...") startTime := time.Now() downloadFile("file1.txt") downloadFile("file2.txt") downloadFile("file3.txt") elapsedTime := time.Since(startTime) fmt.Printf("All downloads completed! Time elapsed: %s\n", elapsedTime) }
??? ????? ??? ?????.
?? ??:
???? ??(t=0ms)
? ?? ???(t=1ms)
? ?? ???(t=101ms)
? ?? ???(t=201ms)
?? ??(t=301ms)
??(t=302-303ms)
???? ??
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????? ?? ??? ???? ??? ??? ???? ???? ?? ?????. ???? ??? ??? ?? ? ???? ??? ??? ?? ?? ??????? ??? ????? ?? ??? ?? ??? ??? ? ????.
?? ?? ??:
- FIFO(????, ???? ??)
- ?? ??, ?? ? ??
- ??? ?? ?? ???? ?????
- ??? ?? ??? ???? ?????
??? ??????:
package main import ( "fmt" "time" ) func downloadFile(filename string) { fmt.Printf("Starting download: %s\n", filename) // Simulate file download with sleep time.Sleep(2 * time.Second) fmt.Printf("Finished download: %s\n", filename) } func main() { fmt.Println("Starting downloads...") startTime := time.Now() downloadFile("file1.txt") downloadFile("file2.txt") downloadFile("file3.txt") elapsedTime := time.Since(startTime) fmt.Printf("All downloads completed! Time elapsed: %s\n", elapsedTime) }
??(ch<-"third" ?? ??? ???? ?)
? ?? ???? ???? ?????
?? ??? ???? ???? ???? ?? ?? ???? ??? ? ????.
??? ??? 2???. ?, ???? ?? ??? ? ?? ?? ??? ? ????.
'? ??'? '? ??'? ??? ?? ?? ????. ? ?? ???? ?? ???? ?? ??? ?? ??? ??? ?????.
?? ???? ??? ???? ???? ?? ??? ?? ?? ???? ?? ??? ????? ? ?? ???? ???? ? ? ?? ??? ?????.
? ?? ???? ?? ??? ???? ?? ??? ?? ?? ?? ??? ???? ? ?? ???? ??? ??? ??? ?????.
???? ??? ????? ?? ??? ???? ??
Aspect | Buffered Channels | Unbuffered Channels |
---|---|---|
Purpose | For decoupling sender and receiver timing. | For immediate synchronization between sender and receiver. |
When to Use | - When the sender can proceed without waiting for receiver. | - When sender and receiver must synchronize directly. |
- When buffering improves performance or throughput. | - When you want to enforce message-handling immediately. | |
Blocking Behavior | Blocks only when buffer is full. | Sender blocks until receiver is ready, and vice versa. |
Performance | Can improve performance by reducing synchronization. | May introduce latency due to synchronization. |
Example Use Cases | - Logging with rate-limited processing. | - Simple signaling between goroutines. |
- Batch processing where messages are queued temporarily. | - Hand-off of data without delay or buffering. | |
Complexity | Requires careful buffer size tuning to avoid overflows. | Simpler to use; no tuning needed. |
Overhead | Higher memory usage due to the buffer. | Lower memory usage; no buffer involved. |
Concurrency Pattern | Asynchronous communication between sender and receiver. | Synchronous communication; tight coupling. |
Error-Prone Scenarios | Deadlocks if buffer size is mismanaged. | Deadlocks if no goroutine is ready to receive or send. |
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?? ???:
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Go? ??? ??? ??? ?? ??? ?? ???? ?? ?? ??? ??? ????!
? ??? ???? ?? ??? Golang? ???? ?? ????? ?? ?????. ??? ??? PHP ??? ????? ?? ?? ??? ?????!

? AI ??

Undress AI Tool
??? ???? ??

Undresser.AI Undress
???? ?? ??? ??? ?? AI ?? ?

AI Clothes Remover
???? ?? ???? ??? AI ?????.

Clothoff.io
AI ? ???

Video Face Swap
??? ??? AI ?? ?? ??? ???? ?? ???? ??? ?? ????!

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