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The achievable acquisition rates of modern triggered nuclear physicsexperiments are heavily dependent on the readout software, in addition to thelimits given by the utilized hardware. This paper presents an asynchronousreadout scheme that significantly improves the livetime of an otherwisesynchronous triggered VME-based data acquisition system. A detailed performanceanalysis of this and other readout schemes, in terms of the basic data transferoperations, is described. The performance of the newly developed scheme as wellas synchronous schemes on two systems has been measured. The measurements showexcellent agreement with the detailed description. For the second system, whichpreviously used a synchronous readout, the deadtime ratio is at a 20 kHztrigger request frequency reduced by 30 % compared to the nearest contender,allowing 10 % more events to be recorded in the same time. The interactionbetween the network and readout tasks for single-core processors is alsoinvestigated. A livetime ratio loss of a few percent can be observed, dependingon the size of the data chunks given to the operating system kernel for networktransfer. With appropriately chosen chunk size, the effect can be mitigated.

VME Readout at and Below the Conversion Time Limit