Logins are slower with the latest release and sometimes I get this error on loading into the game.

1x Grail\Grail-107.lua:7533: script ran too long [string "@Grail\Grail-107.lua"]:7533: in function _LocationStructure'
[string "@grail\Grail-107.lua"]:7508: in function _LocationKnown' [string "@Grail\Grail-107.lua"]:4409: in function _UpdateDatabaseFromLearnedDatabase'
[string "@grail\Grail-107.lua"]:4634: in function ?' [string "@Grail\Grail-107.lua"]:1559: in function ?'
[string "@grail\Grail-107.lua"]:10472: in function `_Tooltip_OnEvent'
[string "@grail\Grail-107.lua"]:11058: in function <Grail\Grail.lua:11058>

Locals:
self =

After a successful login can you tell me the results of the following slash command:

/dump Grail.timings

the same here, login takes a long time, and always errors

Message: Interface\AddOns\Grail\Grail.lua:8196: script ran too long Time: Fri Feb 7 11:06:38 2020 Count: 1 Stack: Interface\AddOns\Grail\Grail.lua:8196: script ran too long [string "=[C]"]: ? [string "@Interface\AddOns\Grail\Grail.lua"]:8196: in function NPCName'
[string "@interface\AddOns\Grail\Grail.lua"]:9611: in function _RawNPCLocations' [string "@Interface\AddOns\Grail\Grail.lua"]:8149: in function NPCLocations'
[string "@interface\AddOns\Grail\Grail.lua"]:9266: in function <Interface\AddOns\Grail\Grail.lua:9254>
[string "=(tail call)"]: ?
[string "@interface\AddOns\Grail\Grail.lua"]:5791: in function ?' [string "@Interface\AddOns\Grail\Grail.lua"]:1363: in function ?'
[string "@interface\AddOns\Grail\Grail.lua"]:10472: in function `_Tooltip_OnEvent'
[string "@interface\AddOns\Grail\Grail.lua"]:11058: in function <Interface\AddOns\Grail\Grail.lua:11058>

Locals: `

Following a clean login that threw no error, I used that and got the following:

1x [string "return Grail.timings"]:1: attempt to index global 'Grail' (a nil value) [string "return Grail.timings"]:1: in function func'
[string "@Blizzard_DebugTools\Dump.lua"]:393: in function DevTools_DumpCommand' [string "@FrameXML\ChatFrame.lua"]:2434: in function ?'
[string "@FrameXML\ChatFrame.lua"]:4859: in function ChatEdit_ParseText' [string "@FrameXML\ChatFrame.lua"]:4523: in function ChatEdit_SendText'
[string "@FrameXML\ChatFrame.lua"]:4559: in function `ChatEdit_OnEnterPressed'
[string ":OnEnterPressed"]:1: in function <[string ":OnEnterPressed"]:1>

Locals:
(*temporary) = nil
(*temporary) = nil
(*temporary) = "attempt to index global 'Grail' (a nil value)"
`

Hmm. Finally hit a character that errored on login as shown below. I ran your dump command, and got the following (hoping I copy it accurately):

[1]={
AchievementsFactionCreation=0.13176369667053,
CreateIndexedQuestList=16549.455515385,
ProcessServerQuests=232.17944157124,
QuestAccepted=0.12089002132416,
AchievementsPandariaLoremaster=59.406551718712,
AchievementsInternalConversion=121.32109081745,
AchievementsInitialSetup=5.7211663722992
}

1x Grail\Grail-107.lua:5572: script ran too long [string "@Grail\Grail-107.lua"]:5572: in function CodeObtainersRace'
[string "@grail\Grail-107.lua"]:7788: in function <Grail\Grail.lua:7732>
[string "=(tail call)"]: ?
[string "@grail\Grail-107.lua"]:4986: in function ?' [string "@Grail\Grail-107.lua"]:1559: in function ?'
[string "@grail\Grail-107.lua"]:10472: in function `_Tooltip_OnEvent'
[string "@grail\Grail-107.lua"]:11058: in function <Grail\Grail.lua:11058>

Locals:
self =

After a successful login can you tell me the results of the following slash command:

/dump Grail.timings

no login possible without error message. dump:
[1]={
AchievementsFactionCreation=0.091511390986852,
AchievementsPandariaLoremaster=3.2681314671645,
AchievementsInternalConversion=87.483962319558,
AchievementsInitialSetup=3.426421440905
}

My Pc:
Ram: 64GB
CPU: Intel I5 6600 @ 3.3GHz
SSD: Crucial MX500 (500GB)

The next two characters also threw errors on login. One showed similar results to the dump command. The other had this:
[1]={
AchievementsInitialSetup=6.795104265213,
AddonLoaded=18039.455547333,
QuestAccepted=0.10649824142456,
ProcessServerQuests=160.57803320885,
AchievementsPandariaLoremaster=70.984166026115,
AchievementsFactionCreation=0.128556554985046,
AchievementsInternalConversion=204.35779595375,
CreateIndexedQuestList=15688.972787023,
}

Wow that timings list is unexpected. Are you on a really slow machine? I am running WoW on a laptop and my CreateIndexQuestList value is 4013.xxx which means about 4 seconds, while yours is about 16 seconds. Admittedly, characters with fewer quests done, etc. seem to have on my laptop about a 3 second value instead of my most complex at 4 seconds. I will investigate if I can instrument and/or improve creating that initial list.

I mean, not that I know of. It's an older computer but it's serving well through a variety of games. I don't know what kind of metrics you'd need to judge that.

And the slowdown definitely became notable after the addon update a few days ago.

Using the fact that the slowdown occurs when the 107 version is used is helpful. I will analyze all the changes and see if any might be impacting the performance.

Can you try to use the latest Grail from GitHub to see if the problem still happens for you?

Ugh... sorry, you've gone beyond my extremely limited GitHub knowledge. Hope the others can help.

Grail 110 is release. It should fix this issue.