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bug#31138: Native json slower than json.el

From: Dmitry Gutov
Subject: bug#31138: Native json slower than json.el
Date: Tue, 16 Apr 2019 16:50:58 +0300
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.6.1

On 16.04.2019 5:38, Eli Zaretskii wrote:

So what should we profile? The internals of code_convert_string?

The entire run of parsing a large JSON.  code_convert_string will be
part of the profile.

All right, my test script and results are attached. Here's how I run it:

sudo perf record -F 99 src/emacs -Q --batch -l ~/examples/elisp/json-test.el
sudo perf report -n --stdio > perf-report.txt

If you have certain recording or output format preferences, please let me know.

Attachment: json-test.el
Description: Text Data

Attachment: perf-report.txt
Description: Text document

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