Company background 

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Invideo is a global AI video creation platform used by 25M+ creators. As user expectations shifted toward higher-fidelity visuals and instant rendering, the platform’s AI pipeline spanning image enhancement, live portrait animation, and speech recognition needed to deliver studio-grade quality without exploding compute costs. The company’s North Star: consistent, high-quality outputs with fast, predictable render times at massive scale.

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The Problem

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Invideo’s growth brought bursty, heterogeneous traffic (consumer surges, enterprise batch jobs). The existing pipeline struggled with:

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• Latency spikes during peak hours that eroded user trust and SLA compliance.
• High and unpredictable GPU costs, driven by redundant compute and suboptimal utilization.
• Long lead times (roughly two weeks) to take AI features from POC into stable production, slowing iteration velocity.
• Inconsistent image quality that required manual tuning, adding operational drag.

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Solution

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Partnering with Invideo’s infra and research teams, we executed a production-first optimization program across model execution, memory, and scaling. The approach prioritized measurable latency/cost gains while improving visual consistency.

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1) Accelerate the hot path with fused kernels

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• Fused GPU kernels replaced multiple small operators in the image/video stages, cutting launch overhead and memory traffic.
• Operator fusion targeted the most time-consuming steps in Clarity Upscaler and Live Portrait to lift throughput without altering outputs.

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2) Eliminate redundant compute with smart caching

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• Introduced feature map / embedding caching between dependent stages so repeated requests and multi-pass enhancements reused intermediate tensors instead of recomputing them.
• Result: lower compute per render and steadier tail latency under repeated edits/export attempts.

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3) Fit more work per GPU with memory-efficient attention

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• Deployed chunked (memory-efficient) attention, reducing peak VRAM and enabling larger effective batch sizes at the same hardware tier.
• Lower memory pressure also reduced OOM retries (often the hidden culprit behind p90/p99 spikes)

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4) Make scale feel instant with rapid autoscaling

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• Tuned autoscaling policies to spin up capacity near-instantly during flash traffic (creator launches, promotions).
• Resource-aware load balancing routed heterogeneous jobs (short/long, light/heavy) to the right replicas to keep utilization high without starving small jobs.

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5) Engineer for resilience under spikes

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• Stress-tested the pipeline for steep traffic ramps, validating stable response times (p50 around 20s, p90 around 40s under synthetic worst-case) before the full optimization rollout, then re-benchmarking after changes to confirm tail improvements and SLA headroom.
  
  

Results

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• Latency: 20 seconds → 11 seconds (–45%) at p50, with steadier tails under load.
• Cost: –56% overall serving/GPU costs for the image/video pipeline.
• Quality & consistency: Visual quality became consistently higher and no longer required manual tuning for most presets.
• Reliability: Low-latency, cost-optimized, SLA-compliant performance during peak events.
• Velocity: POC → prod in 3–4 days (down from ~2 weeks), enabling faster iteration on features and A/Bs

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Invideo’s partnership with Simplismart shows how smart infrastructure tuning can change the game for GenAI at scale. With fused kernels, intelligent caching, and memory-efficient scaling, they cut latency, boosted quality, and reduced costs, all without disrupting creative workflows. Today, Invideo delivers studio-grade AI videos faster, more reliably, and at a fraction of the cost.