1574234 - How much atom duplication is actually happening when writing to XDR buffer per top level script

Status: RESOLVED FIXED

(Core :: JavaScript Engine, task, P1)

Description

[Caroline Cullen [:caroline]]

Show how much atom duplication is happen when writing to the XDR buffer. Of all atoms being written to the buffer, how many are duplicates? Of all the data written to the buffer, how much of it is atoms?

Show averages across multiple top level XDR bytecode encodings in order to show that removing these duplicates will have an impact on XDR buffer storage and caching across main process as well as saving time on buffer writes.

Comment 1

[Caroline Cullen [:caroline]]

A script collecting information about the above categories across 10 distinct top level script encodings the following averages were gathered:

Total atoms written: 13104.1 bytes
Total duplicate atoms written: 5110.1 bytes
Total bytes written: 439693.8 bytes

Average percentage of duplicate atoms to atom bytes written: 39%
Average percentage of atoms to total bytes written: 3%
Average percentage of duplicate atoms to total bytes written: 1.2%

Comment 2

[Nicolas B. Pierron [:nbp] {back on 17/11}]

Caroline, should this bug be marked as resolved, based on comment 1?
Or is there more work to do to analyze XDR?