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Date:   Fri, 14 Aug 2020 11:34:14 -0600
From:   Rob Herring <>
        Andrei Ziureaev <>,
        Masahiro Yamada <>
Subject: [PATCH 0/3] DT validation time improvements

The time to run dt_binding_check and dtbs_check has gotten
significantly slower as the number of schemas has increased. There's 2 
main factors causing validation time on each file to be slow. 

The first is python start-up time. This is a common problem for python 
without much of a solution other than minimizing module imports. 
Eliminating some imports was possible for dt-extract-example, but not 
the other tools. Validating multiple files in a single call is the 
simplest solution. The downside of processing multiple files in one call 
is losing make dependency handling. This is not too important for 
dt-doc-validate as the validation time is <10 sec. 

The 2nd factor is processed-schema*.yaml is now ~2MB and around 2 sec to 
parse (which is done for every .dts and example). Switching 
processed-schema*.yaml to JSON is much faster to parse 

The overall result of these changes is a 2x improvement to dtbs_check 
and a 4-5x improvement to dt_binding_check.


Andrei Ziureaev (1):
  dt-bindings: Use json for processed-schema*

Rob Herring (2):
  dt-bindings: Bump minimum version of dtschema to 2020.8
  dt-bindings: Validate DT binding schema in a single call

 Documentation/devicetree/bindings/.gitignore |  1 +
 Documentation/devicetree/bindings/Makefile   | 45 ++++++++++++--------
 scripts/Makefile.lib                         |  2 +-
 3 files changed, 29 insertions(+), 19 deletions(-)


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