# Assess total memory encryption performance

Review the measured performance impact of encrypted HLOS RAM across graphics, video, camera, and neural processing workloads.

Total memory encryption adds cryptographic processing to DDR traffic, which can affect workload performance. The following results report the performance delta between encrypted HLOS RAM and unencrypted HLOS RAM, so you can plan for the impact on each subsystem.

## Graphics performance

The following table lists the graphics performance delta between encrypted and unencrypted HLOS RAM for each benchmark subtest.

Graphics performance delta

| Benchmark | Subtest | Performance delta |
| --- | --- | --- |
| 3DMark | Fire Strike GT1 | 0% |
| 3DMark | Fire Strike GT2 | 0% |
| 3DMark | Skydiver GT1 | 0% |
| 3DMark | Skydiver GT2 | 0% |
| DX12 Aztec Ruins (ARM64) | dx\_5\_normal (1920x1080) | 1% |
| Wildlife Extreme v1.0.0.1 (ARM64) | AVG | 0% |
| Wildlife Extreme v1.0.0.1 (ARM64) | Overall Score | 0% |
| TimeSpy v2-22-7359 (ARM64) | Graphics-Test1 | 0% |
| TimeSpy v2-22-7359 (ARM64) | Graphics-Test2 | 0% |
| Night Raid v2-22-7359 (ARM64) | Graphics Test 1 | 1% |
| Night Raid v2-22-7359 (ARM64) | Graphics Test 2 | 0% |

## Video performance

The following table lists the video recording performance delta between encrypted and unencrypted HLOS RAM.

Video recording performance delta

| Number | Scenario | Application | Performance delta |
| --- | --- | --- | --- |
| 1 | H.264 [1080@30](mailto:1080%4030) record | Native Camera | 0 |
| 2 | H.264 [UHD@30](mailto:UHD%4030) record | Native Camera | 0.03 |
| 3 | H.264 [1080p@60](mailto:1080p%4060) record | Native Camera | 0 |

## Camera performance

The following table lists the camera performance delta between encrypted and unencrypted HLOS RAM for each scenario.

Camera performance delta

| Number | Scenario | Performance delta |
| --- | --- | --- |
| 1 | B2B snapshot FFC | 2.70% |
| 2 | B2B snapshot RFC | 2.06% |
| 3 | Warm launch FFC | 1.60% |
| 4 | Warm launch RFC | 2.8% |
| 5 | Cold launch FFC | 5.91% |
| 6 | Cold launch RFC | 2.01% |
| 7 | Camcorder recording FFC | 0 |
| 8 | Camcorder recording RFC | 0 |
| 11 | AEC latency FFC | -4.80% |
| 12 | AEC latency RFC | -1.20% |

## Neural processing performance

The following table lists the neural signal processor (NSP) remote procedure call (RPC) latency delta between encrypted and unencrypted HLOS RAM for each buffer size.

NSP RPC latency delta by buffer size

| Scenario (RPC latencies) | Delta (%) |
| --- | --- |
| noop 0K | 0 |
| inbuf 32K | 0 |
| outbuf 32K | 0 |
| inbuf 64K | 0 |
| outbuf 64K | -1 |
| inbuf 128K | 0 |
| outbuf 128K | 0 |
| inbuf 1M | 0 |
| outbuf 1M | 0 |
| inbuf 4M | 0.75 |
| outbuf 4M | 0 |
| inbuf 8M | 0.75 |
| outbuf 8M | 0.75 |
| inbuf 16M | 0 |
| outbuf 16M | 0 |

The following table lists the inference time and RPC deltas for the SNPE-NET-RUN benchmark between encrypted and unencrypted HLOS RAM.

SNPE-NET-RUN inference time and RPC deltas

| Network (SNPE-NET-RUN benchmark) | Inference time delta | RPC delta |
| --- | --- | --- |
| Resnet\_50 | 0.19 | -5.67 |
| Deeplab | 0.09 | 4.7 |

### Related

- [LCP-DARE overview](https://docs.qualcomm.com/doc/80-A0399-49/topic/lcp-dare-overview.html)
- [Configure LCP-DARE regions with QDUTT](https://docs.qualcomm.com/doc/80-A0399-49/topic/configure-lcp-dare-regions-with-qdutt.html)

Last Published: Sep 08, 2026

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