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Improve performance of park loading #7567

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merged 13 commits into from
May 30, 2018

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IntelOrca
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@IntelOrca IntelOrca commented May 27, 2018

  • Prevent objects from being loaded twice:

When the missing objects window was introduced, objects ended up being loaded twice. They were loaded first and then discard when checking if all objects could be loaded. They were then loaded again in the loading of the park.

  • Parallelise the reading of objects:

Most of the time taken to load a park is reading the object files. In debug mode it is the decoding of the legacy object files (needed for images) that take the most time, the large malloc in particular.

  • Optimise SawyerChunkReader:

std::malloc, std::copy_n and std::fill_n have large overheads in MSVC debug builds. Changing them to HeapAlloc, std::memcpy and std::memset respectively greatly improves performance in debug.

@IntelOrca IntelOrca added work in progress refactor A task that will improve code readability, without changing outcome. labels May 27, 2018
@AaronVanGeffen
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Wow, the speed-up is very noticeable on Linux for me, too. Nice work!

@Broxzier Broxzier added the changelog This issue/PR deserves a changelog entry. label May 28, 2018
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IntelOrca commented May 28, 2018

@AaronVanGeffen Is that with debug builds?

@AaronVanGeffen
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Is that with debug builds?

Yes, it is.

@AaronVanGeffen AaronVanGeffen removed the changelog This issue/PR deserves a changelog entry. label May 29, 2018
@AaronVanGeffen AaronVanGeffen merged commit 2127a01 into OpenRCT2:develop May 30, 2018
janisozaur added a commit that referenced this pull request Jun 10, 2018
- Feature: [#1417] Allow saving track designs for flat rides.
- Feature: [#1675] Auto-rotate shops to face footpaths.
- Feature: [#3473] Add button in ride window's maintainance tab to refurbish the ride.
- Feature: [#6510] Ability to select edges or a row of tiles by holding down Ctrl using the land tool.
- Feature: [#7187] Option for early scenario completion.
- Feature: [#7266] Make headless instances use an interactive terminal with access to the in-game console API.
- Feature: [#7267] Leverage more historical data in Finances window.
- Feature: [#7316] Cheat to allow freezing all staff
- Feature: [#7332] Keyboard shortcuts for view path issues and cutaway view.
- Feature: [#7348] Add large half loops to the Vertical Drop Roller Coaster.
- Feature: [#7459] Allow opening and closing of parks that use no money.
- Feature: [#7579] New horizontal +/- spinner widgets to make adjusting values easier.
- Fix: [#2053] When clearance checks are disabled, a track piece ghost can remove non-ghost track pieces.
- Fix: [#2611] Some objects show (undefined string) instead of a description in Korean.
- Fix: [#3596] Saving parks, landscapes and tracks with a period in the filenames don't get their extension.
- Fix: [#5210] Default system dialog not accessible from saving landscape window.
- Fix: [#6134] Scenarios incorrectly categorised when using Polish version of RCT2.
- Fix: [#6141] CSS50.dat is never loaded.
- Fix: [#6647] Changelog window causes FPS drop.
- Fix: [#6938] Banner do not correctly capitalise non-ASCII characters.
- Fix: [#7176] Mechanics sometimes fall down from rides.
- Fix: [#7303] Visual glitch with virtual floor near map edges.
- Fix: [#7313] Loading an invalid path with openrct2 produces results different than expected.
- Fix: [#7327] Abstract scenery and stations don't get fully See-Through when hiding them (original bug).
- Fix: [#7331] Invention list in scenario editor crashes upon removing previously-enabled ride/stall entries.
- Fix: [#7341] Staff may auto-spawn on guests walking outside of paths.
- Fix: [#7354] Cut-away view does not draw tile elements that have been moved down on the list.
- Fix: [#7358] Peeps and staff entering rides still have the slope speed penalty set.
- Fix: [#7382] Opening the mini-map reverts the size of the land tool to 1x1, regardless of what was selected before.
- Fix: [#7402] Edges of neigbouring footpaths stay connected after removing a path that's underneath a ride entrance.
- Fix: [#7405] Rides can be covered by placing scenery underneath them.
- Fix: [#7418] Staff walk off paths with a connection but no adjacent path.
- Fix: [#7434] Diagonal ride segments cannot be deleted if they are isolated.
- Fix: [#7436] Only the first 32 vehicles of a train can be painted.
- Fix: [#7480] Graphs skip values of 0.
- Fix: [#7505] Game crashes when trying to make path over map edge while having clearance checks disabled.
- Fix: [#7528] In park entrance pricing tab, switching tabs happens on mouse-down instead of mouse-up
- Fix: [#7544] Starting a headless server with no arguments causes the game to freeze.
- Fix: [#7571] Hovering a ride design over scenery or tracks will give tons of money.
- Improved: [#2989] Multiplayer window now changes title when tab changes.
- Improved: [#5339] Change eyedropper icon to actual eyedropper and change cursor to crosshair.
- Improved: [#5832] Resize tile inspector automatically when selecting a tile element.
- Improved: [#6221] The scenario editor's invention list is now resizeable.
- Improved: [#7069] The arbitrary ride type selection dropdown is now sorted orthographically, and has its spinners removed.
- Improved: [#7302] Raising land near the map edge makes the affected area smaller instead of showing an 'off edge map' error.
- Improved: [#7435] Object indexing now supports multi-threading.
- Improved: [#7510] Add horizontal clipping to cut-away view options.
- Improved: [#7531] "Save track design" dropdown now stays open.
- Improved: [#7548] Ctrl-clicking with the tile inspector open now directly selects an element and its tile.
- Improved: [#7555] Allow setting the Twitch API URL, allowing custom API servers.
- Improved: [#7567] Improve the performance of loading parks and the title sequence.
- Improved: [#7577] Allow fine-tuning the virtual floor style.
- Improved: [#7608] The vehicle selection dropdown is now sorted orthographically.
- Improved: [#7613] Resizing the staff window now resizes the name and action columns too.
- Improved: [#7627] Allow scrolling up and down on spinners to change their values.
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