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    <p>The routine you use to read from the message channel should define a cache in which incoming messages are stored. These cached messages are then sent to the remote server in bulk either when the cache reaches 100 messages, or 5 seconds have passed. You use a timer channel and Go's <code>select</code> statement to determine which one occurs first.</p> <p>The following example can be run on the <a href="http://play.golang.org/p/KjWz95tsE0">Go playground</a></p> <pre><code>package main import ( "fmt" "math/rand" "time" ) type Message int const ( CacheLimit = 100 CacheTimeout = 5 * time.Second ) func main() { input := make(chan Message, CacheLimit) go poll(input) generate(input) } // poll checks for incoming messages and caches them internally // until either a maximum amount is reached, or a timeout occurs. func poll(input &lt;-chan Message) { cache := make([]Message, 0, CacheLimit) tick := time.NewTicker(CacheTimeout) for { select { // Check if a new messages is available. // If so, store it and check if the cache // has exceeded its size limit. case m := &lt;-input: cache = append(cache, m) if len(cache) &lt; CacheLimit { break } // Reset the timeout ticker. // Otherwise we will get too many sends. tick.Stop() // Send the cached messages and reset the cache. send(cache) cache = cache[:0] // Recreate the ticker, so the timeout trigger // remains consistent. tick = time.NewTicker(CacheTimeout) // If the timeout is reached, send the // current message cache, regardless of // its size. case &lt;-tick.C: send(cache) cache = cache[:0] } } } // send sends cached messages to a remote server. func send(cache []Message) { if len(cache) == 0 { return // Nothing to do here. } fmt.Printf("%d message(s) pending\n", len(cache)) } // generate creates some random messages and pushes them into the given channel. // // Not part of the solution. This just simulates whatever you use to create // the messages by creating a new message at random time intervals. func generate(input chan&lt;- Message) { for { select { case &lt;-time.After(time.Duration(rand.Intn(100)) * time.Millisecond): input &lt;- Message(rand.Int()) } } } </code></pre>
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    1. COgreat full answer , Thanks !
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