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[Cadence VM] Improve compiler/VM / interpreter comparison tool #8221

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[Cadence VM] Improve compiler/VM / interpreter comparison tool #8221

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01d0cea
add progress logging
turbolent Dec 3, 2025
c497a16
add support for subscribing to blocks
turbolent Dec 4, 2025
ed9e482
handle error
turbolent Dec 4, 2025
9ea57f0
wait until comparing new blocks, so hopefully registers are available
turbolent Dec 4, 2025
66e3bf8
re-connect on failures
turbolent Dec 5, 2025
616690f
Merge branch 'feature/cadence-vm' into bastian/improve-vm-comparison-…
turbolent Dec 10, 2025
db9de30
Merge branch 'feature/cadence-vm' into bastian/improve-vm-comparison-…
turbolent Dec 11, 2025
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27 changes: 27 additions & 0 deletions cmd/util/cmd/compare-cadence-vm/cmd.go
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Original file line number Diff line number Diff line change
Expand Up @@ -8,6 +8,7 @@ import (
"os"
"strings"
"sync/atomic"
"time"

"github.com/kr/pretty"
sdk "github.com/onflow/flow-go-sdk"
Expand All @@ -21,6 +22,7 @@ import (
"github.com/onflow/flow-go/fvm"
"github.com/onflow/flow-go/model/flow"
"github.com/onflow/flow-go/module/grpcclient"
"github.com/onflow/flow-go/module/util"
"github.com/onflow/flow-go/utils/debug"
)

Expand Down Expand Up @@ -124,6 +126,16 @@ func run(_ *cobra.Command, args []string) {
log.Fatal().Msg("either provide a single block ID and use --block-count, or provide multiple block IDs and do not use --block-count")
}

blockHeaderProgress := util.LogProgress(
log.Logger,
util.NewLogProgressConfig(
"fetching block headers",
flagBlockCount,
1*time.Second,
100/5, // log every 5%
),
)

blockID := blockIDs[0]
for i := 0; i < flagBlockCount; i++ {
header := debug_tx.FetchBlockHeader(blockID, flowClient)
Expand All @@ -133,8 +145,11 @@ func run(_ *cobra.Command, args []string) {
header: header,
})

blockHeaderProgress(1)

blockID = header.ParentID
}

} else {
for _, blockID := range blockIDs {
header := debug_tx.FetchBlockHeader(blockID, flowClient)
Expand All @@ -146,6 +161,16 @@ func run(_ *cobra.Command, args []string) {
}
}

blockProgress := util.LogProgress(
log.Logger,
util.NewLogProgressConfig(
"executing blocks",
flagBlockCount,
1*time.Second,
100/5, // log every 5%
),
)

var (
blocksMismatched int64
blocksMatched int64
Expand Down Expand Up @@ -175,6 +200,8 @@ func run(_ *cobra.Command, args []string) {
atomic.AddInt64(&blocksMatched, 1)
}

blockProgress(1)

return nil
})
}
Expand Down
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