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Issue metadata

Status: Available
Owner: ----
Components:
EstimatedDays: ----
NextAction: ----
OS: Chrome
Pri: 3
Type: Bug



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Unzipping of nested zip file can be slower than expected

Project Member Reported by yamaguchi@chromium.org, Jan 17 2018

Issue description

Chrome Version: 65.0.3322.0

Split from  Issue 787532 .

Steps To Reproduce:
(1) Prepare a certain amount of files (e.g. 1MB) in Downloads.
(2) Select all and right-click then choose "Zip selection". See [Archive.zip] is created.
(3) Right-click [Archive.zip] and choose "Zip selection". See [Archive (1).zip] created.
(4) Right-click [Archive (1).zip] and choose "Zip selection". See [Archive (2).zip] created.
(5) Open [Archive (2).zip]. See it's mounted as volume and [Archive (1).zip] is inside.
(6) Open [Archive (1).zip] in the previous step. See it's mounted as volume and [Archive.zip] is inside.
(7) Open [Archive.zip].

In other words, zip a zip file several times recursively, so as to make a nested zip file. Then open it recursively.

Expected Result:
Zip files opens smoothly at every stage.

Actual Result:
Steps 6 or 7 may become very slow.
"An opeartion is taking longer than expected. Do you want to abort it?"
notification message appears.
(You may repeat zipping the zip file like steps 3 and 4 more, if it's not enough.)

How frequently does this problem reproduce? (Always, sometimes, hard to
reproduce?)
Can be reproduced on any device by increasing the nest level.
 
Note: At step 7, it may look as if it's not mounting at all silently, because it can take really long time to finish, depending on the nest level and file sizes.

Comment 2 by sashab@chromium.org, Feb 22 2018

Labels: CrOS-FilesApp-Zip

Comment 3 by sashab@chromium.org, Feb 28 2018

Labels: -CrOS-FilesApp-Zip CrOSFilesFeature-Zip

Comment 4 by sashab@chromium.org, Mar 28 2018

Status: Available (was: Untriaged)

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