block production took too long when uploading contract code

[kigawas]

Uploading an ERC20 contract around 60kb will get dev node stuck, a workaround is to modify MILLISECS_PER_BLOCK to 10000 (i.e. 10s).

After the node stuck, pressing Ctrl+C will not work and I can only kill -9

[kigawas]

2019-11-20 16:10:45 Idle (0 peers), best: #44 (0x5260…b828), finalized #43 (0xaaf4…4db7), ⬇ 0 ⬆ 0
^C2019-11-20 16:10:47 Prepared block for proposing at 45 [hash: 0x1e41b57813985ff22f36eefe69221e1882684452c28221d613218e202b82533b; parent_hash: 0x5260…b828; extrinsics: [0xfc8d…d9b3, 0xa081…f2f0, 0x686a…e65f]]
2019-11-20 16:10:47 Discarding proposal for slot 524744614; block production took too long
2019-11-20 16:10:47 Starting consensus session on top of parent 0x5260d71efd31a1b19f2d8d377c37c0756b17a0bcba9830a8864daccd75d3b828
2019-11-20 16:10:51 Prepared block for proposing at 45 [hash: 0x40fb8f9c7950b7692655e0f2a48d101b1d67f44cd5cb17e4fa70379025d391ce; parent_hash: 0x5260…b828; extrinsics: [0xec94…3310, 0xa081…f2f0, 0x686a…e65f]]
2019-11-20 16:10:51 Discarding proposal for slot 524744615; block production took too long
2019-11-20 16:10:51 Starting consensus session on top of parent 0x5260d71efd31a1b19f2d8d377c37c0756b17a0bcba9830a8864daccd75d3b828
[1]    22845 killed     ./target/release/substrate --dev

[kigawas]

Maybe #1856 is kind of related

[bkchr]

CC @pepyakin

[pepyakin]

Duplicate of #3885