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+# Interface: AsyncDeflateOptions
+
+Options for compressing data asynchronously into a DEFLATE format
+
+## Hierarchy
+
+* [DeflateOptions](deflateoptions.md)
+
+* AsyncOptions
+
+  ↳ **AsyncDeflateOptions**
+
+  ↳↳ [AsyncZipOptions](asynczipoptions.md)
+
+## Index
+
+### Properties
+
+* [consume](asyncdeflateoptions.md#consume)
+* [level](asyncdeflateoptions.md#level)
+* [mem](asyncdeflateoptions.md#mem)
+
+## Properties
+
+### consume
+
+• `Optional` **consume**: boolean
+
+*Inherited from [AsyncDeflateOptions](asyncdeflateoptions.md).[consume](asyncdeflateoptions.md#consume)*
+
+Whether or not to "consume" the source data. This will make the typed array/buffer you pass in
+unusable but will increase performance and reduce memory usage.
+
+___
+
+### level
+
+• `Optional` **level**: 0 \| 1 \| 2 \| 3 \| 4 \| 5 \| 6 \| 7 \| 8 \| 9
+
+*Inherited from [DeflateOptions](deflateoptions.md).[level](deflateoptions.md#level)*
+
+The level of compression to use, ranging from 0-9.
+
+0 will store the data without compression.
+1 is fastest but compresses the worst, 9 is slowest but compresses the best.
+The default level is 6.
+
+Typically, binary data benefits much more from higher values than text data.
+In both cases, higher values usually take disproportionately longer than the reduction in final size that results.
+
+For example, a 1 MB text file could:
+- become 1.01 MB with level 0 in 1ms
+- become 400 kB with level 1 in 10ms
+- become 320 kB with level 9 in 100ms
+
+___
+
+### mem
+
+• `Optional` **mem**: 0 \| 1 \| 2 \| 3 \| 4 \| 5 \| 6 \| 7 \| 8 \| 9 \| 10 \| 11 \| 12
+
+*Inherited from [DeflateOptions](deflateoptions.md).[mem](deflateoptions.md#mem)*
+
+The memory level to use, ranging from 0-12. Increasing this increases speed and compression ratio at the cost of memory.
+
+Note that this is exponential: while level 0 uses 4 kB, level 4 uses 64 kB, level 8 uses 1 MB, and level 12 uses 16 MB.
+It is recommended not to lower the value below 4, since that tends to hurt performance.
+In addition, values above 8 tend to help very little on most data and can even hurt performance.
+
+The default value is automatically determined based on the size of the input data.