[TextLayer] Use an Array to build the total transform, rather than concatenating Strings, in expandTextDivs

[Snuffleupagus]

Furthermore, it's possible to re-use the same Array for all textDivs on the page.

[Snuffleupagus]

/botio test

[pdfjsbot]

From: Bot.io (Linux m4)

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Received

Command cmd_test from @Snuffleupagus received. Current queue size: 0

Live output at: http://54.67.70.0:8877/364592d849edf7b/output.txt

[pdfjsbot]

From: Bot.io (Windows)

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Received

Command cmd_test from @Snuffleupagus received. Current queue size: 0

Live output at: http://54.215.176.217:8877/2590bf0eef18be0/output.txt

[pdfjsbot]

From: Bot.io (Linux m4)

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Success

Full output at http://54.67.70.0:8877/364592d849edf7b/output.txt

Total script time: 17.40 mins

• Font tests: Passed
• Unit tests: Passed
• Regression tests: Passed

[pdfjsbot]

From: Bot.io (Windows)

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Success

Full output at http://54.215.176.217:8877/2590bf0eef18be0/output.txt

Total script time: 26.03 mins

• Font tests: Passed
• Unit tests: Passed
• Regression tests: Passed

[timvandermeij]

Nice patches on the performance of the text layer recently! I assume we can do the same for the padding strings here?

[Snuffleupagus]

Nice patches on the performance of the text layer recently!

Thank you!

I assume we can do the same for the padding strings here?

That's indeed the idea here, however I ran into some Linux/Chrome only test failures over in PR #11089 which is why I'm trying to split this into multiple PRs to hopefully get to the bottom of it.