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 1iwBmQ-0006um-EL for pgsql-hackers@arkaria.postgresql.org; Mon, 27 Jan 2020 21:18:46 +0000 Received: from localhost ([127.0.0.1] helo=malur.postgresql.org) by malur.postgresql.org with esmtp (Exim 4.89) (envelope-from ) id 1iwBmO-00053i-Vn for pgsql-hackers@arkaria.postgresql.org; Mon, 27 Jan 2020 21:18:44 +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 1iwBmO-00053b-M4 for pgsql-hackers@lists.postgresql.org; Mon, 27 Jan 2020 21:18:44 +0000 Received: from sss.pgh.pa.us ([66.207.139.130]) by magus.postgresql.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1iwBmH-0004mM-Rq for pgsql-hackers@postgresql.org; Mon, 27 Jan 2020 21:18:44 +0000 Received: from sss1.sss.pgh.pa.us (localhost [127.0.0.1]) by sss.pgh.pa.us (8.14.4/8.14.4) with ESMTP id 00RLIXAb020519; Mon, 27 Jan 2020 16:18:33 -0500 From: Tom Lane To: Robert Haas cc: Andres Freund , Maciek Sakrejda , "pgsql-hackers@postgresql.org" Subject: Re: JIT performance bug/regression & JIT EXPLAIN In-reply-to: References: <20190927072053.njf6prdl3vb7y7qb@alap3.anarazel.de> <20191028232145.oj6jw3vnisikm7nl@alap3.anarazel.de> <20191113200318.glenebxhlcu6crtr@alap3.anarazel.de> <18465.1580145353@sss.pgh.pa.us> <20200127174103.i4nxrzromqk24pfn@alap3.anarazel.de> Comments: In-reply-to Robert Haas message dated "Mon, 27 Jan 2020 14:02:26 -0500" MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-ID: <20517.1580159913.1@sss.pgh.pa.us> Date: Mon, 27 Jan 2020 16:18:33 -0500 Message-ID: <20518.1580159913@sss.pgh.pa.us> List-Id: List-Help: List-Subscribe: List-Post: List-Owner: List-Archive: Precedence: bulk Robert Haas writes: >>> I do not think that the readability-vs-usefulness tradeoff is going >>> to be all that good there, anyway. Certainly for testing purposes >>> it's going to be more useful to examine portions of a structured output. > I intensely dislike having information that we can't show in the text > format, or really, that we can't show in every format. Well, if it's relegated to a "jit = detail" option or some such, the readability objection could be overcome. But I'm still not clear on how you'd physically wedge it into the output, at least not in a way that matches up with the proposal that non-text modes handle this stuff by producing sub-nodes for the existing types of expression fields. regards, tom lane