1e41f4b71Sopenharmony_ci# Bundle Manager Subsystem Changelog 2e41f4b71Sopenharmony_ci 3e41f4b71Sopenharmony_ci## cl.bundlemanager.1 Compression Level of libs Changed in the Packing Tool 4e41f4b71Sopenharmony_ci 5e41f4b71Sopenharmony_ci**Access Level** 6e41f4b71Sopenharmony_ci 7e41f4b71Sopenharmony_ciOthers 8e41f4b71Sopenharmony_ci 9e41f4b71Sopenharmony_ci**Reason for Change** 10e41f4b71Sopenharmony_ci 11e41f4b71Sopenharmony_ciWhen the **compressNativeLibs** parameter in the [module.json5 file](../../../application-dev/quick-start/module-configuration-file.md) is set to **true**, the packing tool packs **libs** in a lower compression level (changed from 5 to 1). This slightly increases the package size but speeds up packaging. 12e41f4b71Sopenharmony_ci 13e41f4b71Sopenharmony_ci**Change Impact** 14e41f4b71Sopenharmony_ci 15e41f4b71Sopenharmony_ciThis change is a compatible change. When **compressNativeLibs** in the [module.json5 file](../../../application-dev/quick-start/module-configuration-file.md) is set to **true**, the size of the unsigned package slightly increases. 16e41f4b71Sopenharmony_ci 17e41f4b71Sopenharmony_ci**API Level** 18e41f4b71Sopenharmony_ci 19e41f4b71Sopenharmony_ci11 20e41f4b71Sopenharmony_ci 21e41f4b71Sopenharmony_ci**Change Since** 22e41f4b71Sopenharmony_ci 23e41f4b71Sopenharmony_ciOpenHarmony SDK 4.1.6.2 24e41f4b71Sopenharmony_ci 25e41f4b71Sopenharmony_ci**Key API/Component Changes** 26e41f4b71Sopenharmony_ci 27e41f4b71Sopenharmony_ciWhen **compressNativeLibs** in the [module.json5 file](../../../application-dev/quick-start/module-configuration-file.md) is set to **true**, the packing tool packs the **libs** library at the default compression level (5) before the modification. After the modification, the packing tool packs the **libs** library at the fast compression level (1). 28e41f4b71Sopenharmony_ci 29e41f4b71Sopenharmony_ci**Adaptation Guide** 30e41f4b71Sopenharmony_ci 31e41f4b71Sopenharmony_ciNo adaptation is required. 32