mirror of https://github.com/go-gorm/gorm.git
8c18714462
Go 1.22 goes somewhat toward addressing the issue using reflect MethodByName disabling linker deadcode elimination (DCE) and the resultant large increase in binary size because the linker cannot prune unused code because it might be reached via reflection. Go Issue golang/go#62257 reduces the number of incidences of this problem by leveraging a compiler assist to avoid marking functions containing calls to MethodByName as ReflectMethods as long as the arguments are constants. An analysis of Uber Technologies code base however shows that a number of transitive imports still contain calls to MethodByName with a variable argument, including GORM. In the case of GORM, the solution we are proposing is because the number of possible methods is finite, we will "unroll" this. This demonstrably shows that GORM is not longer a problem for DCE. Before ``` % go version go version devel go1.22-2f3458a8ce Sat Sep 16 16:26:48 2023 -0700 darwin/arm64 % go test ./... -ldflags=-dumpdep 2> >(grep -i -e '->.*<reflectmethod>') gorm.io/gorm.(*Statement).BuildCondition -> gorm.io/gorm/schema.ParseWithSpecialTableName <ReflectMethod> type:reflect.Value <UsedInIface> -> reflect.(*Value).Method <ReflectMethod> type:reflect.Value <UsedInIface> -> reflect.(*Value).MethodByName <ReflectMethod> ok gorm.io/gorm (cached) ok gorm.io/gorm/callbacks (cached) gorm.io/gorm/clause_test.BenchmarkComplexSelect -> gorm.io/gorm/schema.ParseWithSpecialTableName <ReflectMethod> type:reflect.Value <UsedInIface> -> reflect.(*Value).Method <ReflectMethod> type:reflect.Value <UsedInIface> -> reflect.(*Value).MethodByName <ReflectMethod> ? gorm.io/gorm/migrator [no test files] ok gorm.io/gorm/clause (cached) ok gorm.io/gorm/logger (cached) gorm.io/gorm/schema_test.TestAdvancedDataTypeValuerAndSetter -> gorm.io/gorm/schema.ParseWithSpecialTableName <ReflectMethod> type:reflect.Value <UsedInIface> -> reflect.(*Value).Method <ReflectMethod> type:reflect.Value <UsedInIface> -> reflect.(*Value).MethodByName <ReflectMethod> ? gorm.io/gorm/utils/tests [no test files] ok gorm.io/gorm/schema (cached) ok gorm.io/gorm/utils (cached) ``` After ``` %go version go version devel go1.22-2f3458a8ce Sat Sep 16 16:26:48 2023 -0700 darwin/arm64 %go test ./... -ldflags=-dumpdep 2> >(grep -i -e '->.*<reflectmethod>') ok gorm.io/gorm (cached) ok gorm.io/gorm/callbacks (cached) ? gorm.io/gorm/migrator [no test files] ? gorm.io/gorm/utils/tests [no test files] ok gorm.io/gorm/clause (cached) ok gorm.io/gorm/logger (cached) ok gorm.io/gorm/schema (cached) ok gorm.io/gorm/utils (cached) ``` |
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| .. | ||
| callbacks_test.go | ||
| check.go | ||
| check_test.go | ||
| field.go | ||
| field_test.go | ||
| index.go | ||
| index_test.go | ||
| interfaces.go | ||
| model_test.go | ||
| naming.go | ||
| naming_test.go | ||
| pool.go | ||
| relationship.go | ||
| relationship_test.go | ||
| schema.go | ||
| schema_helper_test.go | ||
| schema_test.go | ||
| serializer.go | ||
| utils.go | ||
| utils_test.go | ||