XML Spy is a modern 32-bit Windows application that runs on Windows 95, 98, NT 4.0, and Windows 2000. It assumes a fair amount of memory to be installed in the system, because it loads each document fully into memory. On the other hand it typically requries less memory than many Java-based applications, because it is written entirely in C++ and thus does not require the overhead of a Java runtime environment. This is necessary in order to completely parse and analyze each document and also greatly improves the viewing and editing speed during normal work. While editing a small to medium sized document (up to 512kB) is possible in as little as 2MB of RAM, opening a 5MB document can consume up to 50MB during the initial parsing process. Memory requirements are also influenced by the unlimited Undo history. When repeatedly cutting and pasting large selections in huge documents, memory can rapidly be depleted. |
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