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bitbake: utils.py: get_file_layer(): Improve performance

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The following code costs a lot of time when there are lot of layers and recipes:

     for collection in collections:
         collection_res[collection] = d.getVar('BBFILE_PATTERN_%s' % collection) or ''

My build has more than 100 layers and 3000 recipes, which calls d.getVar() 300K
(3000 * 100) times and makes 'bitbake-layers show-recipes' very slow, add a
keyword argument to get_file_layer() can fix the problem, it can save about 90%
time in my build (6min -> 40s).

(Bitbake rev: f08a6601c9bb09622855d62e1cedb92fafd2f71d)

Signed-off-by: Robert Yang <liezhi.yang@windriver.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
This commit is contained in:
Robert Yang
2020-09-09 04:55:20 -07:00
committed by Richard Purdie
parent f543535e3c
commit f738ed43e9
2 changed files with 19 additions and 5 deletions
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bitbake/lib/bb/utils.py
+9 -3
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@@ -1457,14 +1457,20 @@ def edit_bblayers_conf(bblayers_conf, add, remove, edit_cb=None):
return (notadded, notremoved)
def get_file_layer(filename, d):
"""Determine the collection (as defined by a layer's layer.conf file) containing the specified file"""
def get_collection_res(d):
collections = (d.getVar('BBFILE_COLLECTIONS') or '').split()
collection_res = {}
for collection in collections:
collection_res[collection] = d.getVar('BBFILE_PATTERN_%s' % collection) or ''
return collection_res
def get_file_layer(filename, d, collection_res={}):
"""Determine the collection (as defined by a layer's layer.conf file) containing the specified file"""
if not collection_res:
collection_res = get_collection_res(d)
def path_to_layer(path):
# Use longest path so we handle nested layers
matchlen = 0