How to reproduce:
1. Open the attached "resources-load-slow.zip" Project
2. Build it on the trunk and run It on an android device
3. Note the time
4. Build the project on the 2019.4 version
5. Compare the time

Expected behavior: Resources.Load takes the same amount of time on every version
Actual behavior: Resources.Load takes longer on 2020 versions than 2019

Reproducible with: 2020.1.0b14, 2020.1.14f1, 2020.2.0b11, 2021.1.0a5
Not reproducible with: 2018.4, 2019.4, 2020.1.0b13

Reproducible devices:
VLNQA00015, Samsung Galaxy Note8 (SM-N950W), Android 8.0.0, CPU: Snapdragon 835 MSM8998, GPU: Adreno (TM) 540
VLNQA00313, Huawei Y6 Ⅱ Compact (HUAWEI LYO-L01), Android 5.1, CPU: MediaTek MT6735, GPU: Mali-T720
VLNQA00335, Samsung Galaxy S20+ 5G (SM-G986B), Android 10, CPU: Exynos 990, GPU: Mali-G77
VLNQA00310 iPad Pro 12.9 1st gen (iOS 13.4.1)

Note:
- Seems to only be reproducible on mobile devices. Windows standalone did not reproduce the issue.
- Not reproducible with default compression
- With better devices, the regression is not so much visible