WIP: an Electron Axe runner for Ace (side-by-side with the Puppeteer one)

[danielweck]

Note that this has its own CLI, due to the way an Electron app is bootstrapped. However, there is no code redundancy due to the introduction of the "shared" CLI package.

[danielweck]

To compare performance:

yarn run ace-electron -f -V -o PATH_TO_OUTPUT_FOLDER PATH_TO_EPUB
vs.
yarn run ace -f -V -o PATH_TO_OUTPUT_FOLDER PATH_TO_EPUB

...right now the Electron runner is slower that the Puppeteer one due to launching multiple browser windows in sequence (no concurrency).

[danielweck]

The Electron-based Axe runner now has the same performance as the Puppeteer one. To check, use this shell script (which is committed at the root of this repository):
./compareAxeRunners.sh PATH_TO_EPUB
This will invoke both Axe runners in sequence (in silent mode but with a final benchmark / time console log), followed by a JSON diff so that the report.json files can be compared.
Note that this shell script creates the following folder structure at the root of the repository (the files are currently not git-ignored):

• CompareAxeRunners/
  • ElectronAxeRunner/
    • data/
    • report.html
    • report.json
  • PuppeteerAxeRunner/
    • data/
    • report.html
    • report.json

[danielweck]

PR now superseded with #314