From 99dfb8df68a2548df47cb76afa1b575b42caf87a Mon Sep 17 00:00:00 2001
From: whyrusleeping <why@ipfs.io>
Date: Tue, 3 Dec 2019 22:18:02 -0800
Subject: [PATCH] dont add too many messages to a block

---
 miner/miner.go | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/miner/miner.go b/miner/miner.go
index 0b8d2f9f5..df2b3cdaa 100644
--- a/miner/miner.go
+++ b/miner/miner.go
@@ -17,6 +17,8 @@ import (
 	"golang.org/x/xerrors"
 )
 
+const MaxMessagesPerBlock = 4000
+
 var log = logging.Logger("miner")
 
 type waitFunc func(ctx context.Context, baseTime uint64) error
@@ -424,6 +426,9 @@ func selectMessages(ctx context.Context, al actorLookup, base *MiningBase, msgs
 		inclCount[from]++
 
 		out = append(out, msg)
+		if len(out) >= MaxMessagesPerBlock {
+			break
+		}
 	}
 	return out, nil
 }