guice - InjectorImpl Guice 中的线程争用

Question

我们在服务中使用 guice 进行 DI。显然，对于任何非单例注入，guice 正在调用以下具有同步锁的方法。对非单例对象是否有任何特定要求也应该通过同步锁？

    private <T> BindingImpl<T> getJustInTimeBinding(Key<T> key, Errors errors, InjectorImpl.JitLimitation jitType) throws ErrorsException {
        boolean jitOverride = isProvider(key) || isTypeLiteral(key);
        if (this.options.jitDisabled && jitType == InjectorImpl.JitLimitation.NO_JIT && !jitOverride) {
            throw errors.jitDisabled(key).toException();
        } else {
            synchronized(this.state.lock()) {
                for(InjectorImpl injector = this; injector != null; injector = injector.parent) {
                    BindingImpl<T> binding = (BindingImpl)injector.jitBindings.get(key);
                    if (binding != null) {
                        return binding;
                    }
                }

                if (this.options.jitDisabled && jitType != InjectorImpl.JitLimitation.NEW_OR_EXISTING_JIT && !jitOverride) {
                    throw errors.jitDisabled(key).toException();
                } else {
                    return this.createJustInTimeBindingRecursive(key, errors);
                }
            }
        }
    }

Guice 版本：4.0