With inspiration from Meloeth's Instant Health addon, cncfanatics has coded a new addon called LibQuickHealth that provides exactly the same function, but improves on it in more than one way. Not only is it a library that does not replace the default UNIT_HEALTH event but adds to it instead, providing health updates from both the combat log and the default UNIT_HEALTH update, but it is also modular. In addition, there is less of a performance hit, as it takes less code and doesn't force-call updates to the frames. Unit frame addons that don't support it (yet) will not show the updates with the lib installed, but once the appropriate module is installed, they will use the library to update health. In addition, it is fully compatible with the default Blizzard frames and does not cause taint.

Currently supported unit frames are Grid, Pitbull, oUF, x-Perl, PerfectRaid, sRaidFrames, and the default Blizzard frames. They have all been tested and are error-free. The library, as well as all modules, can be acquired from the wowace site.

Modules:
Blizzard default UI
Pitbull
Grid
sRaidFrames
PerfectRaid
oUF

Just needs the library:
x-Perl


ag_UF support will be coming soon.

The original thread on the wowace forums is here: QuickHealth

LibQuickHealth works in tandem with the UNIT_HEALTH event, so you will never have inaccurate health values. There is no error checking to be done. All it does is take the latest hp update from UNIT_HEALTH, then add and subtract to it based on combat log events. It can't be inaccurate. When the next UNIT_HEALTH from Blizzard fires, it updates the health to that value, so it is always accurate.

Well I am a coder and after reviewing the most recent InstantHealth I'm wondering what errorchecking it does? Over half of the code seems to be a total hack job to try and prevent all the errors that the original version created because it hijacked the global UnitHealth function affecting every mod.

The original idea was brilliant but the implementation was somewhat sloppy. An opt-in style like LibQuickHealth-1.0 is a lot better than the opt-out style of InstantHealth IMHO.

From what I understand, this library checks it's own calculation with the calculation by the server, but that server info very often doesn't include the latest combat log infos, making it think it is wrong. It will then use that false data to do the next calculation, which is potentially also wrong.

The original Instant Health remembers the last few combat logs and calculates backwards to check the math.

I'm sure a modular system can provide some benefits and a more efficient system load (although I've never noticed anything like a performance hit with either of these mods); I'm just sharing what I have been told by people I trust.

InstantHealth has code to store a history for some reason but the only code that uses it is so messed up its hard to figure out what its ment to do.

Healbot is now supported as well. Just update to the latest version and it will be included.

I'm seeing discrepancies between Grid_QuickHealth and oUF_QuickHealth. Grid seems to update much more quickly (this is relative, it's probably about half a second behind).

I had similar problems with Grid/PitBull discrepancies when using Instant Health, and I'm seeing similar ones with LibQuickHealth as well. This is purely anecdotal, but the differences appeared to be more drastic with Instant Health than with LibQuickHealth, but they still seem to be present.

In general, PitBull seems to show a more accurate representation of current health than Grid. This was the case regardless of using IH or LQH, so perhaps it is a problem with Grid?

I didn't have any such problems with InstantHealth. And in my case, Grid is more "accurate" (updating more quickly) than oUF. There's a possibility that it's the health updating method in my custom oUF layout, so I'll try a different one for a bit tomorrow.

Do you know if VisualHeal is supported also? When I started using InstantHealth I had to stop using VisualHeal, as Meloeth didn't seem to hit the nail on the head with whatever was wrong with it... Would be nice if LQH works with VH? :-)

Encoding a video right now, but here's a screengrab example. Grid (second row from the top, far-right column) says he's at about 7.6k health, both my oUF layout and oUF_Basic by the oUF author show him at 2700. It stays that way for 24 frames and then catches up. You can even see oUF_CombatFeedback register the 5k heal that pushes Grid to the correct value.

Edit: Video for QuickHealth, Video example of InstantHealth