use max channel capacity instead of average

map.go

@@ -1,6 +1,6 @@
 package channel
 
-// MapParallel applies mapper to all I's coming from in and sends their return values to out while conserving input order.
+// MapParallel applies mapper to all I's coming from in and sends their return values to out while preserving input order.
 // All mappings will be done as concurrently as possible
 func MapParallel[I, O any](source <-chan I, mapper func(I) O) (out <-chan O) {
 	return MapParallelWithRunner(source, NewUnlimitedRunner(), mapper)
@@ -39,7 +39,7 @@ func MapParallelWithRunner[I, O any](source <-chan I, runner Runner, mapper func
 	return out
 }
 
-// Map applies mapper to all I's coming from in and sends their return values to out while conserving input order.
+// Map applies mapper to all I's coming from in and sends their return values to out while preserving input order.
 // All mappings will be done successively
 func Map[I, O any](source <-chan I, mapper func(I) O) <-chan O {
 	out := make(chan O, cap(source))

utils.go

@@ -5,11 +5,13 @@ func determineBufferSize[T any](channels []<-chan T) int {
 		return 0
 	}
 
-	bufSize := 0
+	maxBufSize := 0
 	for _, ch := range channels {
-		bufSize += cap(ch)
+		if cap(ch) > maxBufSize {
+			maxBufSize = cap(ch)
 		}
-	return bufSize / len(channels)
+	}
+	return maxBufSize
 }
 
 // Flush consumes all values and discards them immediately.
@@ -20,7 +22,7 @@ func Flush[T any](sources ...<-chan T) {
 }
 
 // Each consumes all values and calls f for each of them.
-// It blocks until all sources are closed
+// It blocks until source is closed
 func Each[T any](source <-chan T, f func(T)) {
 	for value := range source {
 		f(value)
@@ -28,14 +30,14 @@ func Each[T any](source <-chan T, f func(T)) {
 }
 
 // Tee returns 2 channels which both receive all values from source.
-// Its basically a copy function for channels
+// It's basically a copy function for channels
 func Tee[T any](source <-chan T) (<-chan T, <-chan T) {
 	outs := TeeMany(source, 2)
 	return outs[0], outs[1]
 }
 
 // TeeMany returns a given amount of channels which all receive all values from source.
-// Its basically a copy function for channels
+// It's basically a copy function for channels
 func TeeMany[T any](source <-chan T, amount int) []<-chan T {
 	outs := make([]chan T, amount)