perf(ckbtc): Reduce the number of instructions to build an unsigned transaction by a factor 5x to 600x #7866
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# Conflicts: # rs/bitcoin/ckbtc/minter/canbench/results.yml # rs/bitcoin/ckbtc/minter/src/lib.rs
gregorydemay
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CI_ALL_BAZEL_TARGETS
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gregorydemay
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ninegua
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Improve the efficiency of the ckBTC minter when handling withdrawals, where the main cost driver in terms of number of instructions is lead by finding a suitable subset of UTXOs that can be used in a Bitcoin transaction. Using the benchmarks introduced in #7782, the number of instructions required to prepare an unsigned transaction is reduced by a factor 5 to more than 600 on mainnet, depending on the withdrawal amount.
The main optimization consists of storing the UTXOs being sorted by value, instead of the canonical order defined on
ic-btc-interface::Utxoconsisting of the lexicographic order onOutPoint.