Reduce Memory pressure of UpgradePath #5060
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HenryLoenwind
approved these changes
Mar 4, 2019
tterrag1098
reviewed
Mar 15, 2019
| @@ -188,6 +187,12 @@ public static void addAdvancedTooltipEntries(@Nonnull ItemStack itemstack, Entit | |||
| return result.isEmpty() ? "" : NullHelper.first(result.substring(1), ""); | |||
| } | |||
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| public static @Nonnull NNList<IDarkSteelUpgrade> getUpgrades(@Nonnull ItemStack stack) { | |||
| NNList<IDarkSteelUpgrade> list = UpgradeRegistry.getUpgrades(); | |||
| list.removeIf(upgrade -> !upgrade.hasUpgrade(stack)); | |||
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I worry that this O(n) code is going to slow down the JEI handler significantly. Have you profiled the difference?
HenryLoenwind
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May 8, 2019
This is a safer but not as efficient version of #5060
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Hi there,
I did some memory analysis on large modpacks, trying to reduce the memory pressure.
I noticed that the HashMap in your DarkSteelUpgradeRecipeCategory is taking up around 150MB of heap space. If you look at the objects inside the map that take, you find that 45MB of the 150MB are just char arrays. This is because the String id can grow quite huge.
My solution is to simply remove the id, and cache the hashcode instead.
The equals check should not be much slower, as it fails fast for different input items
The result is that DarkSteelRecipeManager uses around 45MB less memory.
Some screenshots from eclipse MAT:
Without my changes:
With the changes in this PR: