gistfile1.txt

private fun measureWorkNs(): Long {
        // Access a non-trivial amount of data to try and 'reset' any cache state.
        // Have observed this to give more consistent performance when clocks are unlocked.
        copySomeData()

        val state = BenchmarkState()
        state.performThrottleChecks = false
        val input = FloatArray(16) { System.nanoTime().toFloat() }
        val output = FloatArray(16)

        while (state.keepRunningInline()) {
            // Benchmark a simple thermal
            Matrix.translateM(output, 0, input, 0, 1F, 2F, 3F)
        }

        return state.stats.min
    }

    /**
     * Called to calculate throttling baseline, will be ignored after first call.
     */
    fun computeThrottleBaseline() {
        if (initNs == 0L) {
            initNs = measureWorkNs()
        }
    }

    /**
     * Makes a guess as to whether the device is currently thermal throttled based on performance
     * of single-threaded CPU work.
     */
    fun isDeviceThermalThrottled(): Boolean {
        if (initNs == 0L) {
            // not initialized, so assume not throttled.
            return false
        }

        val workNs = measureWorkNs()
        return workNs > initNs * 1.10
    }