Reduced gas cost for call to self #1380
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I'm puzzled. Not sure what the requirements are on the filename, because
But travis fails with: |
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I would prefer a more comprehensive solution that also reduces the costs for e.g. repeated calls to the same library. |
| them through `JUMP` requires a bigger effort from the compiler as opposed to being able to use `CALL`s. | ||
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| Using call-to-self provides the guarentee that when making an internal call the function can rely on a clear reset state of memory or context, benefiting both | ||
| contract writers and contract consumers against potentially undetetected edge cases were memory could poison the context of the internal function. |
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@chriseth The simple version of which would probably be keeping a list of addresses touched in the current transaction and searching the list each time there's a call, lowering the gas cost if there's a hit. That would also mean the client would have to keep all touched contracts loaded, which would probably mean an increase to the base cost of a Though I also have no idea how clients currently handle un-loading of contracts after execution so maybe they already keep it cached. |
As discussed offline, that would really be similar to how "net sstore gas metering" is working: the VM should maintain the list of loaded contracts by a given contract and only charge once for loading it. Therefore it doesn't make sense to extend this EIP with that, but would warrant its own EIP. |
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Note that such an extended version would also reduce the cost of contract calls because the actual |
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| ## Specification | ||
| If `block.number >= FORK_BLKNUM`, then decrease the cost of `CALL`, `DELEGATECALL`, `CALLCODE` and `STATICCALL` from 700 to 40, | ||
| if and only if, the destination address of the call equals to the address of the caller. |
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Perhaps this could be combined with a reduction for calling precompiles, as an alternative to EIP-1109?
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Since this was merged as a draft, please take all the discussion to https://ethereum-magicians.org/t/eip-1380-reduced-gas-cost-for-call-to-self/1242 |
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