A loadless timer for Hearthstone has been made recently by Streetbackguy.

At the moment, we're still sorting the leaderboard by real time. But we're encouraging every runners to use the loadless timer. This allows an easier transition if one day we decided to shift into a loadless time leaderboard.

Note that the loadless timer will also stops during the Victory/Defeat screen, because it uses the same memory address as the loading bars. Since this seems to works the same way for every players, this probably will not affect any leaderboard rankings.

Steps to activate the loadless timer in Livesplit:

• In the Edit Splits section, put the game name as shown on the speedrun.com page (e.g. "Curse of Naxxramas") and press Activate to use the loadless timer.
• In the Edit Layout section, it's recommended to put two timers, one for the real time and one for the loadless time.
• In the Layout Settings option for each timer, set it to "Real Time" or "Game Time" for the real/loadless time option.