The game freezes quite often since the latest update, it usually happens after running around or mining. Sometimes it goes away in seconds, while other times it freezes and unfreezes repeatedly in a matter of seconds and I need to restart the world to be able to play. Needless to say, the issue happens again, but not as bad. And this happen on every world.
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Please attach the complete output of the "Game Output" which can be found on the fourth tab of the launcher.
If the launcher closes after game start, please edit your profile and select "Launcher visibility" then, "Keep the launcher open".

or here, I've had some freezes here too. It doesn't occur so often as it did, though
Completely ignored arguments: [--nativeLauncherVersion, 307]
[17:09:35] [Client thread/INFO]: Setting user: Sgyld
[17:09:36] [Client thread/INFO]: LWJGL Version: 2.9.4
[17:09:37] [Client thread/INFO]: Reloading ResourceManager: Default
[17:09:38] [Sound Library Loader/INFO]: Starting up SoundSystem...
[17:09:39] [Thread-5/INFO]: Initializing LWJGL OpenAL
[17:09:39] [Thread-5/INFO]: (The LWJGL binding of OpenAL. For more information, see http://www.lwjgl.org)
[17:09:39] [Thread-5/INFO]: OpenAL initialized.
[17:09:39] [Sound Library Loader/INFO]: Sound engine started
[17:09:46] [Client thread/INFO]: Created: 1024x512 textures-atlas
[17:09:54] [Server thread/INFO]: Starting integrated minecraft server version 1.11.2
[17:09:54] [Server thread/INFO]: Generating keypair
[17:09:55] [Server thread/INFO]: Preparing start region for level 0
[17:09:56] [Server thread/INFO]: Preparing spawn area: 1%
[17:09:57] [Server thread/WARN]: Keeping entity minecraft:chicken that already exists with UUID b462baa8-db5d-49e4-9b79-bcc4299912fa
[17:09:57] [Server thread/INFO]: Preparing spawn area: 57%
[17:09:57] [Server thread/WARN]: Keeping entity minecraft:cow that already exists with UUID c89248c2-0c5d-4004-aadc-1969a84f818f
[17:09:57] [Server thread/INFO]: Changing view distance to 32, from 10
[17:09:58] [Server thread/INFO]: Sgyld[local:E:7af08555] logged in with entity id 126 at (-280.4609842993863, 64.0, 1081.300000011921)
[17:09:58] [Server thread/INFO]: Sgyld joined the game
[17:10:00] [Server thread/WARN]: Keeping entity minecraft:cow that already exists with UUID a432fedb-c144-4571-8dea-5bbc222d51f4
[17:10:00] [Server thread/WARN]: Keeping entity minecraft:sheep that already exists with UUID 6517d8e3-bd1d-4a3c-8612-4bc9adfab536
[17:10:00] [Server thread/WARN]: Keeping entity minecraft:chicken that already exists with UUID 45ddc234-638b-401e-87f9-346bc94e1aba
[17:10:00] [Server thread/WARN]: Keeping entity minecraft:pig that already exists with UUID 142d0bf8-f2e9-4b39-832c-e295edae95bf
[17:10:00] [Server thread/WARN]: Keeping entity minecraft:pig that already exists with UUID 0e21f778-d241-40e7-b0e2-493d70edce87
[17:10:00] [Server thread/WARN]: Keeping entity minecraft:pig that already exists with UUID 574ad3f0-f75f-4030-b9b6-d0bf281e4a46
[17:10:00] [Server thread/WARN]: Keeping entity minecraft:pig that already exists with UUID d837785c-0a26-45dc-abc1-e3ff0dc6c328
[17:10:00] [Server thread/WARN]: Keeping entity minecraft:pig that already exists with UUID 02c9615e-671c-45a4-ba03-e086dd9d8742
[17:10:00] [Server thread/WARN]: Keeping entity minecraft:sheep that already exists with UUID 0c86287d-43da-4aff-8723-058496632f39
[17:10:00] [Server thread/WARN]: Keeping entity minecraft:sheep that already exists with UUID a9b36876-47dc-47c2-88a0-20f15f25bd4e
[17:10:00] [Server thread/WARN]: Keeping entity minecraft:pig that already exists with UUID d30f95e4-1422-45f6-99af-019e8e747d98
[17:10:00] [Server thread/WARN]: Keeping entity minecraft:pig that already exists with UUID 8bf5c33f-eec4-44af-ac89-e46b9c7fc452
[17:10:00] [Server thread/WARN]: Keeping entity minecraft:pig that already exists with UUID 68eecaef-914c-4ee6-8cf2-ce5ca626661e
[17:10:00] [Server thread/WARN]: Keeping entity minecraft:chicken that already exists with UUID 0349f1d7-af6a-4fef-9816-dbcde30130ef
[17:10:00] [Server thread/WARN]: Keeping entity minecraft:cow that already exists with UUID b900e1a2-0ce2-442f-8568-925021bbf884
[17:10:01] [Server thread/WARN]: Keeping entity minecraft:cow that already exists with UUID 05888374-9573-45e3-8481-f4293ebd537b
[17:10:01] [Server thread/WARN]: Keeping entity minecraft:chicken that already exists with UUID 6fb6c862-b2fa-4c19-8bdb-9ede92ba0df0
[17:10:01] [Server thread/WARN]: Keeping entity minecraft:pig that already exists with UUID aa3cb1cc-a702-4072-86f9-c5c61eede34a
[17:10:02] [Server thread/WARN]: Keeping entity minecraft:cow that already exists with UUID 5473bdb9-4d17-42c0-868d-3a606167b229
[17:10:02] [Server thread/WARN]: Keeping entity minecraft:cow that already exists with UUID 72223ba2-fba8-4b66-9c37-275d57d0e958
[17:10:02] [Server thread/WARN]: Keeping entity minecraft:chicken that already exists with UUID 1917728a-c7dc-4603-9432-c4a028c28264
[17:10:02] [Server thread/WARN]: Keeping entity minecraft:pig that already exists with UUID 69f7fc9c-cb26-4ef8-805b-59f11b0ff4e9
[17:10:02] [Server thread/WARN]: Keeping entity minecraft:chicken that already exists with UUID fb0826ba-0197-41fe-a844-858ed0892fb1
[17:10:02] [Server thread/WARN]: Keeping entity minecraft:chicken that already exists with UUID c55172d5-2219-4061-90f4-9fa4340d16a5
[17:10:02] [Server thread/WARN]: Keeping entity minecraft:chicken that already exists with UUID 054f38c8-c885-439a-bc4f-93ab160c00a2
[17:10:02] [Server thread/WARN]: Keeping entity minecraft:sheep that already exists with UUID 3b1d421e-5fa6-4de8-8a9d-47cfd5e3500a
[17:10:02] [Server thread/WARN]: Keeping entity minecraft:chicken that already exists with UUID 95a26a87-6899-4265-b57f-b5fc565c682e
[17:10:02] [Server thread/WARN]: Keeping entity minecraft:chicken that already exists with UUID 95a26a87-6899-4265-b57f-b5fc565c682e
[17:10:02] [Server thread/WARN]: Keeping entity minecraft:cow that already exists with UUID eac1ed9c-ee78-4867-af16-d4a9feed6785
[17:10:03] [Server thread/WARN]: Keeping entity minecraft:cow that already exists with UUID c7576f03-c18f-4c40-9d46-ca38dfa0c2e3
[17:10:03] [Server thread/WARN]: Keeping entity minecraft:pig that already exists with UUID b0b4e8cc-5092-468c-9d81-2f3125e77545
[17:10:04] [Server thread/WARN]: Keeping entity minecraft:cow that already exists with UUID b4ccf8bc-8066-45de-80bb-d1223c27cc76
[17:10:04] [Server thread/WARN]: Keeping entity minecraft:horse that already exists with UUID 03b71dac-b1c2-4c49-b91f-93d4da14488a
[17:10:04] [Server thread/WARN]: Keeping entity minecraft:horse that already exists with UUID 99f541f0-a280-4fe4-b12a-5015c33473a1
[17:10:04] [Server thread/WARN]: Keeping entity minecraft:chicken that already exists with UUID 028ece75-1675-484e-9b18-0451e5a2de42
[17:10:04] [Server thread/WARN]: Keeping entity minecraft:chicken that already exists with UUID 816c2b5b-61db-4be4-bc88-88be2eec8e6c
[17:10:04] [Server thread/WARN]: Keeping entity minecraft:chicken that already exists with UUID 8d0cff34-0e2a-42e3-810c-234873ccfabb
[17:10:04] [Server thread/WARN]: Keeping entity minecraft:chicken that already exists with UUID 43e0e936-d859-43a1-8a3e-0c3b96e4c12d
[17:10:04] [Server thread/WARN]: Keeping entity minecraft:ocelot that already exists with UUID ca7e3302-4504-415e-8f90-9d54a7db8a77
[17:10:04] [Server thread/WARN]: Keeping entity minecraft:chicken that already exists with UUID 141b78f8-dddd-497d-adb0-f2ce21462aa2
[17:10:04] [Server thread/WARN]: Keeping entity minecraft:cow that already exists with UUID 1ecc8f71-634f-4248-96d0-49dabf398235
[17:10:05] [Server thread/WARN]: Keeping entity minecraft:sheep that already exists with UUID 4e24cee2-2ee1-4a5f-af21-775cae5e8048
[17:10:05] [Server thread/WARN]: Keeping entity minecraft:horse that already exists with UUID 9d25a6ca-621f-401d-87f2-96c3fe888414
[17:10:05] [Server thread/WARN]: Keeping entity minecraft:chicken that already exists with UUID 3abf70f5-e05b-4e4b-9c11-d6f48f512482
[17:10:06] [Server thread/WARN]: Keeping entity minecraft:bat that already exists with UUID d2016d0b-5a82-46d8-97d0-6addc7b49e81
[17:10:06] [Server thread/WARN]: Keeping entity minecraft:horse that already exists with UUID b33834d7-4782-4ae1-b819-d183ef1a9af6
[17:10:06] [Server thread/WARN]: Keeping entity minecraft:horse that already exists with UUID ff503b7c-63c8-45d5-aa51-e0aa2341fc32
[17:10:06] [Server thread/WARN]: Keeping entity minecraft:cow that already exists with UUID a4e66bc5-9927-4199-8e8e-57a7c60d4ab6
[17:10:06] [Server thread/WARN]: Keeping entity minecraft:bat that already exists with UUID 6fad89f2-6cd4-450a-87b0-b8a35b9fcdc0
[17:10:06] [Server thread/WARN]: Keeping entity minecraft:sheep that already exists with UUID 62e49df1-734e-45d8-88d9-7c245b998f64
[17:10:07] [Server thread/WARN]: Keeping entity minecraft:chicken that already exists with UUID eada25f0-63a9-4e5f-98ba-426c9a61e69a
[17:10:07] [Server thread/WARN]: Keeping entity minecraft:chicken that already exists with UUID c0a57840-cd84-401a-a385-afd560317af1
[17:10:07] [Server thread/WARN]: Keeping entity minecraft:cow that already exists with UUID d0412e19-9da9-4721-a5f1-4be8ff150ea3
[17:10:07] [Server thread/WARN]: Keeping entity minecraft:sheep that already exists with UUID 2aac6585-fb02-426b-9771-d189e4f36e72
[17:10:08] [Server thread/WARN]: Keeping entity minecraft:cow that already exists with UUID 2bad190c-faa7-43db-ae26-79a3b2d3464a
[17:10:08] [Server thread/WARN]: Keeping entity minecraft:chicken that already exists with UUID 23ef88c4-243c-4d7a-b92e-313b459dec6f
[17:10:09] [Server thread/WARN]: Keeping entity minecraft:chicken that already exists with UUID 9b79e960-901b-4263-a0f4-10caff2d0a8f
[17:10:09] [Server thread/WARN]: Keeping entity minecraft:sheep that already exists with UUID b9914fbf-403c-48f0-a3a8-baea259be67f
[17:10:09] [Server thread/WARN]: Keeping entity minecraft:sheep that already exists with UUID c578d4d6-7b41-40fb-8063-edbecf653f8a
[17:10:09] [Server thread/WARN]: Keeping entity minecraft:chicken that already exists with UUID 5a4da815-319d-4857-8fc6-53f92b7a31d0
[17:10:09] [Server thread/WARN]: Keeping entity minecraft:sheep that already exists with UUID b48e73a7-511e-40ab-82e5-88ac004b7513
[17:10:09] [Server thread/WARN]: Keeping entity minecraft:sheep that already exists with UUID dc31ac3a-2b9e-4a5a-bdb1-364464182edb
[17:10:10] [Server thread/WARN]: Keeping entity minecraft:sheep that already exists with UUID 58a9e362-155d-4a0a-a4fd-120784ab2c27
[17:10:10] [Server thread/WARN]: Keeping entity minecraft:chicken that already exists with UUID 45e0e1cc-8a81-4894-aee1-bbf094ca0467
[17:10:10] [Server thread/WARN]: Can't keep up! Did the system time change, or is the server overloaded? Running 12453ms behind, skipping 249 tick(s)
[17:10:28] [Server thread/WARN]: Can't keep up! Did the system time change, or is the server overloaded? Running 11629ms behind, skipping 232 tick(s)
[17:10:43] [Server thread/WARN]: Can't keep up! Did the system time change, or is the server overloaded? Running 6825ms behind, skipping 136 tick(s)
[17:10:59] [Server thread/WARN]: Can't keep up! Did the system time change, or is the server overloaded? Running 8002ms behind, skipping 160 tick(s)
[17:11:10] [Server thread/WARN]: Keeping entity minecraft:chicken that already exists with UUID e30836a6-ed20-4e16-84d5-47bddfea7690
[17:11:17] [Server thread/WARN]: Can't keep up! Did the system time change, or is the server overloaded? Running 11138ms behind, skipping 222 tick(s)
[17:11:40] [Server thread/WARN]: Can't keep up! Did the system time change, or is the server overloaded? Running 12406ms behind, skipping 248 tick(s)
[17:11:47] [Server thread/WARN]: Can't keep up! Did the system time change, or is the server overloaded? Running 2468ms behind, skipping 49 tick(s)
[17:12:15] [Server thread/WARN]: Can't keep up! Did the system time change, or is the server overloaded? Running 14144ms behind, skipping 282 tick(s)
[17:12:54] [Server thread/WARN]: Can't keep up! Did the system time change, or is the server overloaded? Running 30689ms behind, skipping 613 tick(s)
[17:13:01] [Server thread/WARN]: Can't keep up! Did the system time change, or is the server overloaded? Running 6954ms behind, skipping 139 tick(s)
[17:13:50] [Server thread/INFO]: Saving and pausing game...
[17:13:50] [Server thread/INFO]: Saving chunks for level 'Copy of Sveni2000'/Overworld
[17:13:53] [Server thread/INFO]: Saving chunks for level 'Copy of Sveni2000'/Nether
[17:13:53] [Server thread/INFO]: Saving chunks for level 'Copy of Sveni2000'/The End
[17:13:53] [Server thread/WARN]: Can't keep up! Did the system time change, or is the server overloaded? Running 30969ms behind, skipping 619 tick(s)