diff --git a/interleaver/main.go b/interleaver/main.go
index 9c61b26..5af72c4 100644
--- a/interleaver/main.go
+++ b/interleaver/main.go
@@ -9,6 +9,7 @@ import (
 	"fmt"
 	"log"
 	"os"
+	"sync"
 
 	"bitbucket.org/s_l_teichmann/mtredisalize/common"
 )
@@ -54,10 +55,12 @@ func copyProducerToConsumer(producer BlockProducer, consumer BlockConsumer) erro
 	done := make(chan struct{})
 	defer close(done)
 
+	pool := sync.Pool{New: func() interface{} { return new(Block) }}
+
 	go func() {
 		defer close(blocks)
 		for {
-			block := new(Block)
+			block := pool.Get().(*Block)
 			if err := producer.Next(block); err != nil {
 				if err != ErrNoMoreBlocks {
 					log.Printf("Reading failed: %s\n", err)
@@ -77,6 +80,8 @@ func copyProducerToConsumer(producer BlockProducer, consumer BlockConsumer) erro
 		if err := consumer.Consume(block); err != nil {
 			return err
 		}
+		block.Data = nil
+		pool.Put(block)
 		i++
 		if i%1000 == 0 {
 			log.Printf("%d blocks transferred.\n", i)