clovis: Add a method to slim a trace by dropping large objects.

clovis: Add a method to slim a trace by dropping large objects.

JSON is less expensive than objects for trace events. A ~45MB trace file
expands to more than 500MB of memory. This CL adds a method to return
the trace to its JSON format. This increases the peak memory usage when
processing a single trace (and the processing time, since serializing
the trace is not free), but reduces the total memory cost when holding
several traces at once.

Committed: https://crrev.com/65f484b3674d177e98ed04aa2ec30482e05a6c3a
Cr-Commit-Position: refs/heads/master@{#384548}

[Benoit L, 2016-04-01 09:40:33]

lizeb@chromium.org changed reviewers:
+ mattcary@chromium.org

[Benoit L, 2016-04-01 09:40:34]

Hi,

I'm not 100% convinced that this will help that much, the proper solution is
likely to serialize the DependencyGraph object and then perform analysis on it,
but this could be helpful still.

What do you think?

[mattcary, 2016-04-01 10:36:50]

lgtm

Worth a shot. I agree that serializing the graph is the right way to do it long
term.

[Benoit L, 2016-04-01 10:57:07]

The CQ bit was checked by lizeb@chromium.org

[commit-bot: I haz the power, 2016-04-01 10:57:21]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1848203003/20001
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1848203003/20001

[commit-bot: I haz the power, 2016-04-01 11:32:47]

Committed patchset #2 (id:20001)

[commit-bot: I haz the power, 2016-04-01 11:33:54]

Description was changed from

==========
clovis: Add a method to slim a trace by dropping large objects.

JSON is less expensive than objects for trace events. A ~45MB trace file
expands to more than 500MB of memory. This CL adds a method to return
the trace to its JSON format. This increases the peak memory usage when
processing a single trace (and the processing time, since serializing
the trace is not free), but reduces the total memory cost when holding
several traces at once.
==========

to

==========
clovis: Add a method to slim a trace by dropping large objects.

JSON is less expensive than objects for trace events. A ~45MB trace file
expands to more than 500MB of memory. This CL adds a method to return
the trace to its JSON format. This increases the peak memory usage when
processing a single trace (and the processing time, since serializing
the trace is not free), but reduces the total memory cost when holding
several traces at once.

Committed: https://crrev.com/65f484b3674d177e98ed04aa2ec30482e05a6c3a
Cr-Commit-Position: refs/heads/master@{#384548}
==========

[commit-bot: I haz the power, 2016-04-01 11:33:55]

Patchset 2 (id:??) landed as
https://crrev.com/65f484b3674d177e98ed04aa2ec30482e05a6c3a
Cr-Commit-Position: refs/heads/master@{#384548}