> For the complete documentation index, see [llms.txt](https://docs.velthoryn.site/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.velthoryn.site/reference/compute-budget.md).

# Compute Budget

This reference lists the measured and estimated compute unit (CU) consumption for every instruction in the Velora vesting program. Use these values to set `ComputeBudgetProgram.setComputeUnitLimit()` in your transactions.

**Program ID:** `G6iaigUdi2btFwUc2N65twfxwA8Ew5uKKhKJ5RJa8wvu`

**Measurement tool:** Mollusk 0.13.1 + Solana CLI 3.1.12 (Agave)

***

## Per-Instruction CU Table

| Instruction               | Measured CU     | Recommended Limit | Notes                                                 |
| ------------------------- | --------------- | ----------------- | ----------------------------------------------------- |
| `get_vested_amount`       | 614 - 916       | 1,200             | Read-only, no accounts mutated                        |
| `create_campaign_native`  | 9,378 - 12,372  | 15,000            | Scales with `leaf_count`                              |
| `create_campaign` (SPL)   | \~10,000 \*     | 15,000            | Estimated from native path + SPL overhead             |
| `create_stream_native`    | 11,617 - 16,117 | 17,000            | Single-recipient, includes vault init CPI             |
| `create_stream` (SPL)     | \~12,000 \*     | 16,000            | Estimated from native path + SPL overhead             |
| `fund_campaign_native`    | 7,891           | 10,000            | SOL transfer to PDA                                   |
| `fund_campaign` (SPL)     | \~8,000 \*      | 12,000            | Estimated from native path + SPL overhead             |
| `claim` (native)          | \~13,200        | 15,000            | Per-leaf ledger adds \~1,700 CU over pre-fix baseline |
| `withdraw` (SPL)          | --              | 20,000            | Raised from 15K for CPI variance headroom             |
| `cancel_campaign`         | 5,672           | 8,000             | Sets `cancelled_at`, clears `paused`                  |
| `cancel_stream`           | \~12,000 \*     | 15,000            | Estimated; Mollusk blocked by `init_if_needed`        |
| `set_milestone_released`  | 5,301           | 7,000             | Single bit flip on milestone flags                    |
| `update_root`             | 5,567           | 7,000             | Replaces Merkle root + leaf count                     |
| `pause_campaign`          | 5,380           | 7,000             | Toggle `paused` flag                                  |
| `unpause_campaign`        | 5,383           | 7,000             | Toggle `paused` flag                                  |
| `close_claim_record`      | 5,131           | 7,000             | Drains `ClaimRecord` rent to beneficiary              |
| `instant_refund_campaign` | --              | 12,000            | Mollusk blocked by `Optional<T>`                      |
| `withdraw_unvested`       | --              | 10,000            | Mollusk blocked by `Optional<T>`                      |

{% hint style="info" %}
Entries marked with `*` are estimates, not direct measurements. SPL paths require `init_if_needed` or `Optional<T>` account resolution not yet supported by Mollusk 0.13.x. SPL CU measurements will be added when Mollusk 0.14+ is available.
{% endhint %}

***

## Detailed Measurements

### get\_vested\_amount

| Scenario                | CU  |
| ----------------------- | --- |
| Cliff, before cliff     | 615 |
| Cliff, after cliff      | 615 |
| Linear, mid-vesting     | 909 |
| Linear, fully vested    | 614 |
| Milestone, flag not set | 624 |
| Milestone, flag set     | 655 |
| Linear, cancelled clamp | 916 |

### create\_campaign\_native

| Scenario                       | CU             |
| ------------------------------ | -------------- |
| 100 leaves, cancellable        | 9,378          |
| 10,000 leaves, non-cancellable | 9,372 - 12,372 |

### create\_stream\_native

| Scenario       | CU              |
| -------------- | --------------- |
| Linear, 1 leaf | 11,617 - 16,117 |

### fund\_campaign\_native

| Scenario             | CU    |
| -------------------- | ----- |
| 500M lamports top-up | 7,891 |

### cancel\_campaign

| Scenario                | CU    |
| ----------------------- | ----- |
| Partially claimed (30%) | 5,672 |

### set\_milestone\_released

| Scenario          | CU    |
| ----------------- | ----- |
| Milestone index 0 | 5,301 |

### update\_root

| Scenario            | CU    |
| ------------------- | ----- |
| New root + 5 leaves | 5,567 |

### pause / unpause\_campaign

| Scenario           | CU    |
| ------------------ | ----- |
| Pause (3 leaves)   | 5,380 |
| Unpause (3 leaves) | 5,383 |

### close\_claim\_record

| Scenario      | CU    |
| ------------- | ----- |
| Fully claimed | 5,131 |

***

## Client Integration

### Setting Compute Budget

For all transactions, prepend compute budget instructions before the program instruction:

```typescript
import { ComputeBudgetProgram, Transaction } from "@solana/web3.js";

const tx = new Transaction()
  .add(
    ComputeBudgetProgram.setComputeUnitLimit({ units: 15_000 }),
    ComputeBudgetProgram.setComputeUnitPrice({ microLamports: 100 }),
  )
  .add(yourProgramInstruction);
```

### Priority Fee Recommendations

| Priority | Micro-lamports / CU | Use Case                                            |
| -------- | ------------------- | --------------------------------------------------- |
| Low      | 0 - 100             | Non-urgent operations (fund, pause, close)          |
| Medium   | 100 - 500           | Standard transactions (create, claim)               |
| High     | 500 - 2,000         | Time-sensitive operations (claim during congestion) |

***

## Rent Costs

| Account       | Space (bytes) | Approximate Rent (SOL) | Notes                                                                             |
| ------------- | ------------- | ---------------------- | --------------------------------------------------------------------------------- |
| `VestingTree` | 8 + 315 = 323 | \~0.00224              | Anchor discriminator + campaign data                                              |
| `ClaimRecord` | 8 + 224 = 232 | \~0.00161              | `zero_copy` layout with per-leaf ledger. Legacy 121-byte accounts resized lazily. |

***

## General Recommendations

* **Always set a CU limit.** Without an explicit limit, the runtime defaults to 200,000 CU per instruction -- you will overpay on priority fees.
* **Add 20% headroom** over measured values to account for runtime variance.
* **SPL paths cost more** than native SOL paths due to CPI overhead to the Token Program. Budget an extra 20-30% for SPL token instructions.
* **`claim` with per-leaf ledger** (Issue #29 fix) costs approximately 1,700 CU more than the pre-fix version due to the per-leaf tracking logic.


---

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