| Element | Missed Instructions | Cov. | Missed Branches | Cov. | Missed | Cxty | Missed | Lines | Missed | Methods |
| Total | 243 of 399 | 39% | 32 of 36 | 11% | 21 | 27 | 45 | 80 | 4 | 9 |
| newStruct(StructLayout) | | 0% | | 0% | 8 | 8 | 22 | 22 | 1 | 1 |
| cacheFFIType(Type) | | 35% | | 14% | 7 | 8 | 10 | 17 | 0 | 1 |
| getString(Ruby, long) | | 0% | | 0% | 3 | 3 | 8 | 8 | 1 | 1 |
| newArray(Type.Array) | | 0% | | 0% | 2 | 2 | 4 | 4 | 1 | 1 |
| FFIUtil() | | 0% | n/a | 1 | 1 | 1 | 1 | 1 | 1 | |
| buildTypeMap() | | 100% | n/a | 0 | 1 | 0 | 22 | 0 | 1 | |
| getFFIType(Type) | | 100% | | 100% | 0 | 2 | 0 | 3 | 0 | 1 |
| getFFIType(NativeType) | | 100% | n/a | 0 | 1 | 0 | 1 | 0 | 1 | |
| static {...} | | 100% | n/a | 0 | 1 | 0 | 2 | 0 | 1 |