We were doing get on Redis two times for each emoji while building the custom/standard/all lists which where resulting in ~3710 Redis calls. Given the emoji DB file is loaded in memory while we build/cache the emojis list this is unnecessary and slow.
As a simplification in pseudo code here is an explanation of what we were doing:
```ruby
emojis.each |emoji_name|
aliases = get_aliases_from_redis_cache(emoji_name)
is_tonable = get_is_tonable_from_redis_cache(emoji_name)
build_emoji(emoji_name, aliases, is_tonable)
end
```
The two redis calls are now simplified to a simple hash access: `@db[emoji_name]`
Previously calls such as `Emoji["smile"]` would force a full dehydration of
objects from Redis.
This introduces a version safe site and global emoji cache so lookups are
cheap. It eliminates iterating through the list of emojis and pulling from
redis.
Distributed cache uses a normalized name as the key and stores an Array tuple
with version and Emoji. Successful hits always confirm version matches.
Interface to Emoji object remains unchanged.
We opted for 2 caches to improve reuse on multisites. misses though will be
stored in both caches. If there is a hit on the global cache we can avoid
looking up in site local cache and storing a miss there.
DEV: Replace instances of Discourse.base_uri with Discourse.base_path
This is clearer because the base_uri is actually just a path prefix. This continues the work started in 555f467.
We have the `# frozen_string_literal: true` comment on all our
files. This means all string literals are frozen. There is no need
to call #freeze on any literals.
For files with `# frozen_string_literal: true`
```
puts %w{a b}[0].frozen?
=> true
puts "hi".frozen?
=> true
puts "a #{1} b".frozen?
=> true
puts ("a " + "b").frozen?
=> false
puts (-("a " + "b")).frozen?
=> true
```
For more details see: https://samsaffron.com/archive/2018/02/16/reducing-string-duplication-in-ruby
Sometimes we would like to create a base image without any DB access, this
assists in creating custom base images with custom plugins that already
includes `public/assets`
Following this change set you can run:
```
SPROCKETS_CONCURRENT=1 DONT_PRECOMPILE_CSS=1 SKIP_DB_AND_REDIS=1 RAILS_ENV=production bin/rake assets:precompile
```
Then it is straight forward to create a base image without needing a DB or
Redis.
This reduces chances of errors where consumers of strings mutate inputs
and reduces memory usage of the app.
Test suite passes now, but there may be some stuff left, so we will run
a few sites on a branch prior to merging
* improved emoji support
- always optimize images as part of the task
- use the unicode standard ordering/naming for sections
* UX: more height for when there are recently used
FIX: buildTranslationTree was erroring when translations overlapped (ie. ":-)" and ":-))")
FIX: emoji translations wasn't working properly when translations overlapped
Daniel Waterworth
David Taylor
Joffrey JAFFEUX
Sam
Ayke Halder
Rafael dos Santos Silva
Roman Rizzi
Robin Ward
Tim Lange
Régis Hanol
Guo Xiang Tan
Guo Xiang Tan