TL;DR here's the addon: https://github.com/xntp800/HonorSpy
I've been working on an update to resolve the memory/loading issues since I got merged in from Zeth'Kur. On that server the addon worked just fine, without too many active pvpers, but as you know things are different on Elysium. With standings lists exceeding 4000 players.
My initial focus was on adding a slash command to allow players to limit the number of results in the standings table. As it turns out manipulating the database/looking up information is not particularly resource intensive. What really taxes the system is drawing 4000 lines in the table.
I forked the github and went to work on my changes, but I also incorporated the changes of another person who had also forked the repo. You can see the changes they made here: https://github.com/kakysha/HonorSpy/compare/master...orgasmix:master
To put it simply: Their changes add two additional commands to the addon. One to lookup your own information, and one to lookup an arbitrary player name. These commands never draw any table so they use virtually no resources. Finally they restricted the standings table strictly to 200 players.
They also made some changes to the way standing/bracket/RP is calculated. I am not familiar with the math or the history behind these things so whether they are accurate or not I leave up to you to decide. Suffice to say my statistics didn't seem to change much from the old numbers to the new ones so it can't be too far off.
I worked off of their additions to add my own command here: https://github.com/orgasmix/HonorSpy/compare/master...xntp800:master
Again to summarize: I added a slash command /hs players 0-10000 to allow you to set the amount of standings displayed yourself. I set the default to 750, and entering 0 returns ALL the results in the database, not recommended. I find that performance really starts to suffer after displaying about 1000 players.
Anyway, here is the addon in it's current state: https://github.com/xntp800/HonorSpy
Follow the usual instructions for installing. Rename folder etc. You must also delete the HonorSpy database file in your WTF folder for this update. Don't worry it will get repopulated quick.
If you find any bugs/have any ideas for improvements or changes please feel free to let me know. I've been using the new version for a couple days now and it is infinitely more usable than it was before. That being said this is the first addon I've worked on to this extent, so the whole thing has certainly been a learning experience.