Received: from malur.postgresql.org ([217.196.149.56]) by arkaria.postgresql.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_CBC_SHA1:256) (Exim 4.89) (envelope-from ) id 1hVtY1-0003nr-KD for pgsql-performance@arkaria.postgresql.org; Wed, 29 May 2019 08:02:57 +0000 Received: from localhost ([127.0.0.1] helo=malur.postgresql.org) by malur.postgresql.org with esmtp (Exim 4.89) (envelope-from ) id 1hVtXy-0005eC-Gu for pgsql-performance@arkaria.postgresql.org; Wed, 29 May 2019 08:02:54 +0000 Received: from magus.postgresql.org ([2a02:c0:301:0:ffff::29]) by malur.postgresql.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_CBC_SHA1:256) (Exim 4.89) (envelope-from ) id 1hVtXy-0005cZ-80 for pgsql-performance@lists.postgresql.org; Wed, 29 May 2019 08:02:54 +0000 Received: from mail2.code-sourcery.de ([138.201.66.53]) by magus.postgresql.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_CBC_SHA1:256) (Exim 4.89) (envelope-from ) id 1hVtXw-0004Ra-Q1 for pgsql-performance@postgresql.org; Wed, 29 May 2019 08:02:53 +0000 Received: from lxtobi.voipfuture.com (unknown [213.238.34.194]) by mail2.code-sourcery.de (Postfix) with ESMTPSA id E06FE1FCD8 for ; Wed, 29 May 2019 10:02:50 +0200 (CEST) To: PostgreSQL mailing lists From: Tobias Gierke Subject: JIT in PostgreSQL 12 ? Message-ID: Date: Wed, 29 May 2019 10:02:50 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.7.0 MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 7bit Content-Language: en-US List-Id: List-Help: List-Subscribe: List-Post: List-Owner: List-Archive: Precedence: bulk Hi, Browsing the PostgreSQL 12 release notes I noticed that JIT is now enabled by default. Having not followed PostgreSQL development closely - does this mean that compilation results are now getting cached and compilation is no longer executed separately for each worker thread in a parallel query ? Cheers, Tobias